Yes I agree , I was terrified of my maths teacher . On a Friday afternoon double maths he’d give me homework and would say learn your times tables and on Monday morning for every you get wrong you’ll get the slipper . I hope he’s sat in hell
This technique I studied a few years ago - and many of them I have either known, been shown by colleagues, or funnily enough been shown by students of mine as they try to interpret the simplest method of doing math. Thanks for the question!
25x22 can be done with another method which particularly I find easier though I follow your teaching and it works too. So, to multiply any number by 25 keep in mind 25x 4= 100 That means, if we divide the other multiplicand by 4 we get this: 22÷4 ( to divide by 4 just divide by 2 twice!) Thus, 22÷2=11, now again 11÷2=5.5 X10= 550 our final answer! But mentally you can do it in 2 seconds with practice
@@abdullahmunirnouroz2090 The first step would be to find the largest multiple of 100 that is lower than both numbers. Let's say the numbers are 254 and 337. 254 = 200+54 and 337 = 200+137 so (200+54) * (200+137) then multiply using FOIL = 200*200 + 200*137 + 54*200 + 54*137 then factor = 200*(200+137+54) + 54*137 = 2*100*391 + 54*137 = 2*39100 + 54*137 = 78200 + 54*137 next use the same trick to multiply 54*137 (you might want to write down the 78200 unless you can memorize it) so 54 = 50+4 and 137 = 50+87 (50+4) * (50*87) = 50*50 + 50*87 + 4*50 + 4*87 hmm. I don't like 4*87, so how about this 54*137 = (54*2) * (137/2) 108*137/2 = (100+8) * (100+37) / 2 = (100*100 + 100*37 + 8*100 + 8*37) / 2 = (100*(145) + 8*37) / 2 = (14500 + 8*30 + 8*7) / 2 = (14500 + 240 + 56) / 2 = 14796 / 2 = 7000+350+45+3 = 7398 +78200 (remember?) = 85598 Tada! Of course 4*87 isn't really that bad so 50*(54+87) + 4*87 = 5*10*141 + 4*87 = 5*1410 + 4*87 = 7050 + 348 = 7398 same as the other way
Reverend George well yes, there's over 7 billion people on earth and at least 40% have internet access. You're obviously not going to be the only one interested lol
But not all 2.8 people who have internet access are interested. Maybe even the people who *dont* have internet access are interested. You never know what goes on in people’s minds.
@@Khonic23 How many people you know that are interested in math or learning in general that go as far to look up videos on YT on math? 😂You know this generation doesnt find interest in actually using the internet to learn
I cannot stop watching this series. This should definitely be taught. I couldn't imagine doing 2 digit number multiplication in my head before this yet it's so simple. Well done.
I FEELL LIKE A MATH MASTER EHEHEHE. Spent 2 hours practicing your method. Thank you. I'm feeling more confident about my mental math now. THANK YOU. I LOVE YOU DUDE.
I now feel like a wizard. RUclips just obliterated all my early years of early math education in less than 30 minutes and 2 videos. I'm buzzing in excitement as an adult.
Thank you SO much, you are an amazing person. I learned so much more in TWO days of watching your videos than I did in the 4 years of high school!!! I'm definitely subscribing. Your accent makes the videos much more entertaining! Once again, thank you.
This is so helpful to not only myself but my middle schooler since he has been virtual schooling since March 2020. Along with your other videos you have made helping him with math so much easier. Cheers!
Hi 👋 I am 14 and this September I am going into year 10 and I’m always getting nervous coz I felt like I might fail math but omg I stumbled across your channel and honestly I am so grateful I have you teach me better than my teachers and I can do it at my own speed I have learnt things in less than 1 hour . I have subscribed to you , your amazing and I can’t wait to watch more videos this helps me a lot ! 😊
Your channel is amazing! After years of getting by with minimal basic math skills I decided to make some changes. Your channel is an inspiration. You make learning so much more enjoyable and natural. Now I'm getting into physics and algebra and I'm loving it! If you had told me 2 days ago that I would be multiplying double digits in my head I would have told you that you were crazy! Awesome job!
Mindblown... Validation of my struggles with math late in grammar school and through high school. Not that I was "dumb" but the teaching technique and presentation were so wretched.
thank you so much. iv just started a new job as a junior design engineer, i cant believe how rusty my simple problem solving has become over the years in sales! love the videos not to much not to little and a touch of dry humour
I'm studying for the PCAT and needed to learn to multiply without a calculator (sadly I've become dependent on them). This video has helped A LOT. Thank you!
I know you made this a long time ago, but I struggle with mental math and multiplication, so I completely avoided it because it made me feel so stupid. Thank you so much for helping me, these tricks are super helpful! wish I knew about you when I was younger :)
Your insights and techniques regarding mental math and multiplication are greatly appreciated. This is very empowering. Thanks for sharing these concepts.
Thank you, this will help me alot since i am in grade 8. On the side I done: 19 x 26 = 494 32 x 27 = 864 43 x 37 = 1,591 52 x 38 = 1,976 64 x 71 = 4,544 106 x 98 = 10,388 43 x 51 = 2193 13 x 8 = 104 512 x 497 = 254,464
On a side note, I've* done... On a side note, I have* done... On a side note, I *did do these/this.... On a side note, I have also completed....(Best choice.) Now pay attention in English class (punctuation and grammar) and you'll be good to go!
This is great. I’ve always done something like this for easy numbers by rounding and then adding or subtracting the difference, but this is more efficient with fewer steps, and I can do it with less simple numbers.
In less than an hour this channel made me better at maths than a decade of it at school did....Im probably still going to use my phone though because it doesn't make silly mistakes like me :)
ok so i maybe in year 11 right now and i am starting to see my grades drop when i study alot, so i started to search how i can improve my maths and when i found your videos and started to watch them it made my mind start up again. so i thank you for helping me change my studying habbits for when i have my final full year exam some time at the end of the year. Your Examples really help my mind think like it was in primary school. Thanks TecMath
We don’t realise how much our teachers motivate us and how much of an impact they have. My maths teacher would always single me out and mock me and it made me hate maths. Now I’m wanting to go to university and do engineering I need maths so I am revisiting all the basics and then further maths and so on but this made me realise maths can be fun. I wish this guy was my maths teacher then I wouldn’t have needed to revisit in the first place(my maths teacher eventually had to leave because he was found messaging underage girls)
Thank you sooooo much! I love it plus when having to be patient (like waiting in line) I like to make up numbers and do them in my head. I’m looking to get real fast at it. Thank you again!
4:42 I wouls multiply 20*28 and then subtract the extra 1*28 in my head . All numbers close to 10 20 30 or whatever can be calculated like that. But calculation always depends of the specific calculation and to the knowledge of the person trying to solve it. I was lucky to have a math teacher wit, both great skills in knowledge and great skills in getting the message through. i think most of us in class loved math. He made it so interesting, so many ways to deal with numbers. It has been a great hel pall my life, being able to calculate. We got taught a lot i newer use, like ( a+b)(a-b)= and (a+b). It was in the 70`in Denmark.
I really hate math but when I watch yours and try to do it myself. OMG! It is really fun and fast. I will try to teach this tip to my Thai students in English class. You are the first Math teacher who I subcribed.
Gotta say this in every video I watch, but always had math phobia, Which contributed to me not learning the fundamentals of maths in school. It was hella boring for me, so in university, I really struggled with math-related courses. Ie Stats. Now that I'm going back for a second degree that is math-heavy in Fall,2020. I gotta start somewhere. This guy is gonna save my life! (July,17,2020)
At 3:00 minutes it's because you multiply by your base. If you have a base of 20 you multiply 28 * 20 = 560. Same with a base 10, 30, or higher. You always multiply by the base
Aged 68 I’ve learnt how to multiply large numbers in my head. Yay. Was always able to multiply up to 12 x 12 in my head and some other easy ones but this is great!
With numbers such as 31x39 (same first digit and second digits that add up to 10), there is an even faster way of working it out. Take the first digit (3 in this case) and multiply it by the number that's 1 more (4 in this case). 3x4=12. That will give you the first 2 digits of your answer. Then multiply the second digits (1x9=9). This will give you the last two digits of your answer (09 in this case). So the answer is 1209. This is particularly useful in finding the squares of numbers ending in 5. Take 75 squared: Multiply 7 by 8, you get 56, then multiply 5 by 5, you get 25. Stick them together and you get 5625. Similarly, 95 squared is 9025 (9x10=90 and 5x5=25).
Thank you very much x36 tec you have helped a lot of young minds in castlemaine i know that you do this to help people and this is just another comment reminding you its working, your giving people i care about a better chance. simply cant put into a chat bar how much that means to me and them
This is just awesome, thanks a lot for posting them. I am teaching these methods to my nephew who is 7 and he is loving them. Not to mention I LOVE them a lot. Thank you SIR
Dang, I've always been good at mental maths, I developed my own method and I'm probably the best at it of anyone I know personally but this is probably faster given some practice refining this. Awesome, looking forward to learning more!
For 26 x 35 instead of using 20 for the base number you can used 30 too. Using 30 for the base is easier. Figured it out before he used a base of 30 for the first time. 🙂 This is great!👍
For the equation example of 26 x 35 (answered at 7:45), I decided to test my luck and try to see if I could figure it out using base 30. I was so happy when I actually got it.
25*23 can be done this way: 25*23=25*25-50=625-50=575 this is based on the X5 * X5 trick so its not a very generalized trick but its really easy to use when its applicable
Base 10 should have been taught when i was in grade school. I am 43, this is not only easier but it teaches kids to use their brain in a more complex way, spacial memory is what i like to call it. Visualizing numbers in your head and holding them as a place value without writing it down step by step is how it should be done in my opinion, then only writing it on paper or calculator to check your answer. I think its a great brain exercise to help strengthen those neural connections at an early age
Now all I need is an opportunity where multiplying 78 x 56 comes up so I can impress people. Sadly I don't remember a time this was useful besides school.
12:32 This is diagonal multiplication. What is harder to do in your head is multiplying two digit numbers that are not near a convenient reference number (base). 76×78 for instance. You can do it but there are more calculations to keep tract of. I used a ref of 70. 6 +78 = 84 , 840×7 = 5600+ 28 = 5880, 5880 + 6(8)=5880+48 = 5928. That's a lot to keep track of in your head IMHO. You could use a reference of 100 but now you have to also multiply 14 x12 in your head. Another diagonal multiplication. 12:32
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My life would have been a lot different if you were my math teacher at school. Thanks a lot for your lessons!
Same here…😊
When I went to public school, they taught from a curriculum not research or experience!
They were there to get a nice pay check!😃
Yes I agree , I was terrified of my maths teacher . On a Friday afternoon double maths he’d give me homework and would say learn your times tables and on Monday morning for every you get wrong you’ll get the slipper . I hope he’s sat in hell
This technique I studied a few years ago - and many of them I have either known, been shown by colleagues, or funnily enough been shown by students of mine as they try to interpret the simplest method of doing math.
Thanks for the question!
what bse we use to multiply 3 digit numbers and how to do it??
your students are literally 90000 iq
25x22 can be done with another method which particularly I find easier though I follow your teaching and it works too.
So, to multiply any number by 25 keep in mind 25x 4= 100
That means, if we divide the other multiplicand by 4 we get this:
22÷4 ( to divide by 4 just divide by 2 twice!) Thus, 22÷2=11, now again
11÷2=5.5 X10= 550 our final answer!
But mentally you can do it in 2 seconds with practice
@@trensic5716 ong
@@abdullahmunirnouroz2090 The first step would be to find the largest multiple of 100 that is lower than both numbers.
Let's say the numbers are 254 and 337.
254 = 200+54 and 337 = 200+137 so
(200+54) * (200+137) then multiply using FOIL
= 200*200 + 200*137 + 54*200 + 54*137 then factor
= 200*(200+137+54) + 54*137
= 2*100*391 + 54*137
= 2*39100 + 54*137
= 78200 + 54*137 next use the same trick to multiply 54*137 (you might want to write down the 78200 unless you can memorize it)
so 54 = 50+4 and 137 = 50+87
(50+4) * (50*87)
= 50*50 + 50*87 + 4*50 + 4*87
hmm. I don't like 4*87, so how about this
54*137 = (54*2) * (137/2)
108*137/2 = (100+8) * (100+37) / 2
= (100*100 + 100*37 + 8*100 + 8*37) / 2
= (100*(145) + 8*37) / 2
= (14500 + 8*30 + 8*7) / 2
= (14500 + 240 + 56) / 2
= 14796 / 2
= 7000+350+45+3
= 7398
+78200 (remember?)
= 85598 Tada!
Of course 4*87 isn't really that bad so
50*(54+87) + 4*87
= 5*10*141 + 4*87
= 5*1410 + 4*87
= 7050 + 348
= 7398 same as the other way
Thanks my friend.
I'm nearly 60 and really enjoyed learning a new technique. Will find this very useful.
You have a patient teaching style too. Cheers
chopper hello
chopper
@@krishnavavhal7443 chopper
I am hooked, just love this stuff. I am pleased that there are so many viewers, it's good to see it's not just me then who finds this stuff exciting!
Reverend George well yes, there's over 7 billion people on earth and at least 40% have internet access. You're obviously not going to be the only one interested lol
Khonic would that be 2.8 billion people interested?????
But not all 2.8 people who have internet access are interested. Maybe even the people who *dont* have internet access are interested. You never know what goes on in people’s minds.
@@Khonic23 How many people you know that are interested in math or learning in general that go as far to look up videos on YT on math? 😂You know this generation doesnt find interest in actually using the internet to learn
Every since I was young iv'e had massive phobia of maths, due to my dyscalculia. Your videos were a massive help, thanks.
I cannot stop watching this series. This should definitely be taught. I couldn't imagine doing 2 digit number multiplication in my head before this yet it's so simple. Well done.
I FEELL LIKE A MATH MASTER EHEHEHE. Spent 2 hours practicing your method. Thank you. I'm feeling more confident about my mental math now. THANK YOU. I LOVE YOU DUDE.
I now feel like a wizard.
RUclips just obliterated all my early years of early math education in less than 30 minutes and 2 videos. I'm buzzing in excitement as an adult.
yess also see 3blue1brown
🤯🤯🤯🤯🤯🤯🤯🤯🤯🤯
I know right! My mind is blown, and that's not easy to do!
@@no-body-nobody ???
Me too!
Same here!
I just wanted to thank you for posting these videos....I have never been so fast at math before!!! Thank you so much for sharing your wisdom!!!
Thank you SO much, you are an amazing person. I learned so much more in TWO days of watching your videos than I did in the 4 years of high school!!! I'm definitely subscribing. Your accent makes the videos much more entertaining! Once again, thank you.
I am 64 and enjoying this stuff. Thank you sir!
Goodness gracious! I wish someone had taught me that in my school years... Still it's a good mental exercise. Thousand thanks!
This is so helpful to not only myself but my middle schooler since he has been virtual schooling since March 2020. Along with your other videos you have made helping him with math so much easier. Cheers!
Hi 👋 I am 14 and this September I am going into year 10 and I’m always getting nervous coz I felt like I might fail math but omg I stumbled across your channel and honestly I am so grateful I have you teach me better than my teachers and I can do it at my own speed I have learnt things in less than 1 hour . I have subscribed to you , your amazing and I can’t wait to watch more videos this helps me a lot ! 😊
he's got a nice way of speaking and a soothing voice. thanks a lot.
Your channel is amazing! After years of getting by with minimal basic math skills I decided to make some changes. Your channel is an inspiration. You make learning so much more enjoyable and natural. Now I'm getting into physics and algebra and I'm loving it! If you had told me 2 days ago that I would be multiplying double digits in my head I would have told you that you were crazy! Awesome job!
Mindblown... Validation of my struggles with math late in grammar school and through high school. Not that I was "dumb" but the teaching technique and presentation were so wretched.
thank you so much. iv just started a new job as a junior design engineer, i cant believe how rusty my simple problem solving has become over the years in sales! love the videos not to much not to little and a touch of dry humour
I'm studying for the PCAT and needed to learn to multiply without a calculator (sadly I've become dependent on them). This video has helped A LOT. Thank you!
100% agree. Hey looking back, I hope you did well!
Same!!
same here man
Same. I take it in 2 days. Scored a 75 on my practice test but I have self confidence issues and am uneducated in simple math
Me too😊😊👍
I know you made this a long time ago, but I struggle with mental math and multiplication, so I completely avoided it because it made me feel so stupid. Thank you so much for helping me, these tricks are super helpful! wish I knew about you when I was younger :)
Now my day wasn't completely useless.
same ^^
Katie Morris same
same bro ^^^^^
i misread the name as Kamala Harris lol
If you smile at someone, your day will never be useless.
Your insights and techniques regarding mental math and multiplication are greatly appreciated. This is very empowering. Thanks for sharing these concepts.
he sounds excited when he talks its so cool
saeedie archer maths can be exciting
@@tonybarfridge4369 math is exciting
@@tonybarfridge4369 uUhuio0
Thank you, this will help me alot since i am in grade 8. On the side I done:
19 x 26 = 494
32 x 27 = 864
43 x 37 = 1,591
52 x 38 = 1,976
64 x 71 = 4,544
106 x 98 = 10,388
43 x 51 = 2193
13 x 8 = 104
512 x 497 = 254,464
good for you
On a side note, I've* done...
On a side note, I have* done...
On a side note, I *did do these/this....
On a side note, I have also completed....(Best choice.)
Now pay attention in English class (punctuation and grammar) and you'll be good to go!
I am amazed that you did these and got them all right including some which were not covered in the video such as 106 x 98
This is great. I’ve always done something like this for easy numbers by rounding and then adding or subtracting the difference, but this is more efficient with fewer steps, and I can do it with less simple numbers.
I have never calculated in my head faster than today. I am forever changed for the better.
Brilliant! I am so thankful. Finally a way to simply and quickly do math that is conceptual and leads to mental math!
Best method ever. I just solved a base 200 problem this way and got it completely right the first try.
In less than an hour this channel made me better at maths than a decade of it at school did....Im probably still going to use my phone though because it doesn't make silly mistakes like me :)
لم افهم اللغة التي تتكلم بها جيدا..... لكن شرحك كان جميل جداااااا ... فقد فهمت هذه الطريقة الرائعة 1000/100
شكرا لك .. ويسر الله لك كل عسير ......
ok so i maybe in year 11 right now and i am starting to see my grades drop when i study alot, so i started to search how i can improve my maths and when i found your videos and started to watch them it made my mind start up again. so i thank you for helping me change my studying habbits for when i have my final full year exam some time at the end of the year. Your Examples really help my mind think like it was in primary school. Thanks TecMath
I love that he gets right to the important parts of the information. I feel like Khan academy had all these extra thoughts.
For the fear of multiplication on a vetassess test, this technique has now given me greater confidence. Thank you.
I am working towards Pilot Aptitude Test and these videos help me a lot when it comes do doing math questions without calculator.
Love this video. I been doing the long way in my head. Now you just help me to do multiplication in my head way faster. 👍
We don’t realise how much our teachers motivate us and how much of an impact they have. My maths teacher would always single me out and mock me and it made me hate maths. Now I’m wanting to go to university and do engineering I need maths so I am revisiting all the basics and then further maths and so on but this made me realise maths can be fun. I wish this guy was my maths teacher then I wouldn’t have needed to revisit in the first place(my maths teacher eventually had to leave because he was found messaging underage girls)
I'm not showing this to anyone. I really wanna beat my friend in maths and now I can. MUAHAHAHA.
Shadow 88 Me Too... MUAAAAHAHAHAHA
me too
Your friend already knows the trick . MUAHAHA.
@Jarod David They probably fat after the 2 years.
Thank you sooooo much! I love it plus when having to be patient (like waiting in line) I like to make up numbers and do them in my head. I’m looking to get real fast at it. Thank you again!
I am from India, I enjoyed your way of teaching very much
you're literally getting me ready for my aptitude test for the navy. love your vids chief
You are a great teacher for this old gal. I got many of these right! The next to the last group especially and the last one.
4:42 I wouls multiply 20*28 and then subtract the extra 1*28 in my head . All numbers close to 10 20 30 or whatever can be calculated like that. But calculation always depends of the specific calculation and to the knowledge of the person trying to solve it. I was lucky to have a math teacher wit, both great skills in knowledge and great skills in getting the message through. i think most of us in class loved math. He made it so interesting, so many ways to deal with numbers. It has been a great hel pall my life, being able to calculate. We got taught a lot i newer use, like ( a+b)(a-b)= and (a+b). It was in the 70`in Denmark.
I really hate math but when I watch yours and try to do it myself. OMG! It is really fun and fast. I will try to teach this tip to my Thai students in English class. You are the first Math teacher who I subcribed.
Gotta say this in every video I watch, but always had math phobia, Which contributed to me not learning the fundamentals of maths in school. It was hella boring for me, so in university, I really struggled with math-related courses. Ie Stats. Now that I'm going back for a second degree that is math-heavy in Fall,2020. I gotta start somewhere. This guy is gonna save my life! (July,17,2020)
Omg! I am in love with this technique. I totally plan to use this strategy for my GMAT! Thanks again man!
Good Luck!
At 3:00 minutes it's because you multiply by your base. If you have a base of 20 you multiply 28 * 20 = 560. Same with a base 10, 30, or higher. You always multiply by the base
Aged 68 I’ve learnt how to multiply large numbers in my head. Yay. Was always able to multiply up to 12 x 12 in my head and some other easy ones but this is great!
this is gonna help so much in finance, thank you
Go Tigers!
I am really enjoying getting back into math without a calculator. Thank you
With numbers such as 31x39 (same first digit and second digits that add up to 10), there is an even faster way of working it out.
Take the first digit (3 in this case) and multiply it by the number that's 1 more (4 in this case).
3x4=12.
That will give you the first 2 digits of your answer.
Then multiply the second digits (1x9=9).
This will give you the last two digits of your answer (09 in this case).
So the answer is 1209.
This is particularly useful in finding the squares of numbers ending in 5.
Take 75 squared: Multiply 7 by 8, you get 56, then multiply 5 by 5, you get 25.
Stick them together and you get 5625.
Similarly, 95 squared is 9025 (9x10=90 and 5x5=25).
Thanks for commenting - this happens in the next part video - base level 50!
Can you do a video on functions?
I would appreciate it.
You make Math seem so easy..
Thank you
Thank you very much x36 tec you have helped a lot of young minds in castlemaine i know that you do this to help people and this is just another comment reminding you its working, your giving people i care about a better chance. simply cant put into a chat bar how much that means to me and them
This is brilliant, I'm so glad I came across this! No more reaching for the calculator when impossible looking numbers show up ^^
This will be a huge help for day-to-day stuff. Thanks a lot!
Unbelievable. Perfect method. Thanks. Liked, Subscribed
That’s literally mindblowing! Thank you so much
Very interesting! (X+A)*(X+B)= X^2+(A+B)X+AB=((X+A)+B)*X+AB, very smart!!! Very smart way to use algebra!!
This is just awesome, thanks a lot for posting them. I am teaching these methods to my nephew who is 7 and he is loving them. Not to mention I LOVE them a lot. Thank you SIR
You're an absolute legend, thanks for this.
Amazing methods, I can do my sums in no time now, thank you so much for the tutorial
I've been watching you for long time and your videos are perfect mate thanks keep up the good work👌
You have changed the way I see maths. I used to panic when doing maths off the top of my head, but I can do these so easily now! Thank you so much!!
Dang, I've always been good at mental maths, I developed my own method and I'm probably the best at it of anyone I know personally but this is probably faster given some practice refining this. Awesome, looking forward to learning more!
optimizing mental technique to multiply big number faster is FANTASTIC !
For 26 x 35 instead of using 20 for the base number you can used 30 too. Using 30 for the base is easier. Figured it out before he used a base of 30 for the first time. 🙂 This is great!👍
26*35 = 13 * 70 = 910
These are amazing. Thank you so much. Wish I knew this 20+ years ago FFS! Well done sir and g’day to you!
For the equation example of 26 x 35 (answered at 7:45), I decided to test my luck and try to see if I could figure it out using base 30. I was so happy when I actually got it.
So much better than what the schools teach! Brilliant...
Thank you so much, I actually get all this! I sucked at math in school because fear got the better of me.
I no longer feel behind in my class!! Thank you so much
25*23 can be done this way:
25*23=25*25-50=625-50=575
this is based on the X5 * X5 trick so its not a very generalized trick but its really easy to use when its applicable
Your IQ is ∞×∞. Seriously, I'm considered a genius and you actually teach me things I don't know yet. You're Einstein.
Base 10 should have been taught when i was in grade school. I am 43, this is not only easier but it teaches kids to use their brain in a more complex way, spacial memory is what i like to call it. Visualizing numbers in your head and holding them as a place value without writing it down step by step is how it should be done in my opinion, then only writing it on paper or calculator to check your answer. I think its a great brain exercise to help strengthen those neural connections at an early age
You have given me a great gift! Thank you! If only I had known this so many years ago!
I always get fascinated by this math tricks, good work and keep up!
Now all I need is an opportunity where multiplying 78 x 56 comes up so I can impress people.
Sadly I don't remember a time this was useful besides school.
If you don't find math useful then you are just dumb or in a dead end career
Prepare to get many more subscribers and views cuz I just shared this EVERYWHERE!
7:02 - You did this one with base 20; I did it with base 30 (-4 and +5) and got the same answer (Yay!)
superb technique for mental multiplication. Thank you
This is a really fast way to count these in your head! Thank you.
Wow! Just love it! Math is one of my passions.
I had to go back to algebra because set in my ways to see what you're doing.
Wow that's a nice rearrangement of binomials!
Thank you so much for the video, and it actually works and isn’t hard to understand.
good stuff. Trying to work through 'why this works". Appreciate your thoughts.
damn, I waste my time doing long math in the past. Awesome video
I am preparing for the 11+ and this really helps
this is a really interesting metod, very usefull thanks a lot.....
thank you man you blow my mind I can't stop to watch. now I will teach it other.
It's so much helpfull for everyone 👍thnk u sir 🙏🏻
Your a smart guy!!You must be gifted.
Brilliant hope ill never forget this tough.
I guest every day you will learn sometime different never learn this way of multiplication in school thanks and thumbs up
Mr. Tech Math man's voice is so dreamy :-)
Thanks for helping know my teacher will be surprised about it
42 years old and wishing I was back at school if this guy was the teacher! my teachers need to go back to school themselves evidently
Brilliant. This is so much fun.
I am speechless, Thank you
12:32 This is diagonal multiplication. What is harder to do in your head is multiplying two digit numbers that are not near a convenient reference number (base). 76×78 for instance. You can do it but there are more calculations to keep tract of. I used a ref of 70. 6 +78 = 84 , 840×7 = 5600+ 28 = 5880, 5880 + 6(8)=5880+48 = 5928. That's a lot to keep track of in your head IMHO. You could use a reference of 100 but now you have to also multiply 14 x12 in your head. Another diagonal multiplication. 12:32
Bro you're god of mathematics !
Your videos are awesome. So easy to follow