Honestly? I think this lesson is much more than just math, it's about how to teach. Simple and friendly, the best I have ever seen up to this point. Greetings from Brazil.
Just a quick tip for people. It’s best to use the closest number that can be divided by 10. In the case of, for example, 19x7, don’t think of it as (10 + 9) unless it’s easier for you. Think of it like a 20 - 1. You’ll end up with 7(20 - 1), since the first number (In this case, 20) is a product of 10 multiplied with something, separate that number from his zero. In this case, 20 will turn into a 2 * 10, and you would just need to multiply 7 with 2, and add a 0 at the end. 2 * 7 = 14, with a zero, it’s 140, remember that multiplying by 10 is just adding a 0 to an integer number. After this cool “tricks”, let’s resolve. 7(20 - 1) 7 * 20 + 7 * -1 7 * 2 * 10 - 7 14 * 10 - 7 140 - 7 133 I consider this a quicker method for numbers that are near a higher product of 10, for example, 19, 29, 39, 48, 58, etc.
Another tip, but pretty advanced for the kind of people that are watching this video, take advantage of knowing the square powers of numbers. For example, 7 * 14, you can separate that 14 into 7 * 2, and there you go, 7 * 7 which is the square power of 7, which is the famous 49. Now you have an “easier” multiplication. 49 * 2, which is just 40+40+9+9 = 80 + 18 = 98. The same works out for 8 * 16, having 8 * 8 * 2, the square power of 8 is 64, multiplied by 2 is 60+60+4+4 = 120 + 8 = 128.
I love how I already know this in my own fast way but Man U help people so much! I have friends that suck at math, and I’m sure if anyone that sucks at math watches this channel, they will become a god at it!
Times the tens in your head then store it. Times the ones in your head and store that. Then add. But you have to know your times table and your addition facts. This method is faster than a calculator for simpler problems. What’s 8x17? It’s 80+56. What’s 80+56? It’s 100 + 36. To do the above in your head you need to know 8x7 is 56 and 8+5 is 13.
4:01 ...Or you could re-write 19 as ( 20 - 1 ), therefore having to calculate next 5 x 20 (which is 100 - easy!) and then subtract 5 from it (which is, again, easy!), thus yielding 95. I'm quite surprised: Aren't you guys being taught this in elementary school? (i.e. how to quickly and efficiently manipulate numbers in your own mind - and also feel comfortable and confident while doing it)
![Learn to Multiply Decimals - [6-1-24]](http://i.ytimg.com/vi/vCeyW8ZUilc/mqdefault.jpg)
![Learn to Multiply Decimals - [6-1-24]](/img/tr.png)
![Learn Scientific Notation - [6-5-3]](http://i.ytimg.com/vi/qYAjWdzLJ14/mqdefault.jpg)
Every child deserves a teacher like you Sir ...... Those who run away from Math should listen to you. Thank you for your patience and dedication 🙏
This man has a gift for teaching math in an accessible way
Literally Finding this Channel Is a Blessing for me
Thanks A lot
Welcome!
same here, i've learned a lot more watching these videos, than i ever did at school, i'm 55 now, thank you math's and science.
Honestly? I think this lesson is much more than just math, it's about how to teach. Simple and friendly, the best I have ever seen up to this point. Greetings from Brazil.
Thanks so very much!
MAN! U ARE THE MOST HIGHLY SKILLED "DOWN TO EARTH" EDUCATOR I HAVE EVER HAD THE PLEASURE TO LISTEN TO PERIOD...NOW I AM ADDICTED. THANKS SO MUCH
I just wanted to say my Math and Science membership has been very helpful !!! Money well spent ! 🤓💪🏼
Me too
Thank you so much! I’m really happy to be a small part of your educational success! Jason
Thank you so much and I’m so happy that you’re getting great use out of the site!
@@MathAndScience big fan sir
I can’t stress enough on what a fantastic teacher you are …OMG
Just a quick tip for people. It’s best to use the closest number that can be divided by 10. In the case of, for example, 19x7, don’t think of it as (10 + 9) unless it’s easier for you. Think of it like a 20 - 1. You’ll end up with 7(20 - 1), since the first number (In this case, 20) is a product of 10 multiplied with something, separate that number from his zero. In this case, 20 will turn into a 2 * 10, and you would just need to multiply 7 with 2, and add a 0 at the end. 2 * 7 = 14, with a zero, it’s 140, remember that multiplying by 10 is just adding a 0 to an integer number. After this cool “tricks”, let’s resolve.
7(20 - 1)
7 * 20 + 7 * -1
7 * 2 * 10 - 7
14 * 10 - 7
140 - 7
133
I consider this a quicker method for numbers that are near a higher product of 10, for example, 19, 29, 39, 48, 58, etc.
Another tip, but pretty advanced for the kind of people that are watching this video, take advantage of knowing the square powers of numbers.
For example, 7 * 14, you can separate that 14 into 7 * 2, and there you go, 7 * 7 which is the square power of 7, which is the famous 49. Now you have an “easier” multiplication. 49 * 2, which is just 40+40+9+9 = 80 + 18 = 98. The same works out for 8 * 16, having 8 * 8 * 2, the square power of 8 is 64, multiplied by 2 is 60+60+4+4 = 120 + 8 = 128.
Great videos. I have recommended many people.
Thank you so much Deirdre!
This method is simple and will encourage my fellow students to try this method. 👌
Thanks so much!
@@MathAndScience welcome Sir👌
I am a big fan of your videos. Wonderful explanation ...math is not a big deal after all...
I love how I already know this in my own fast way but Man U help people so much! I have friends that suck at math, and I’m sure if anyone that sucks at math watches this channel, they will become a god at it!
Thanks Jason for sharing 🌟
thank you! you are excellent in explaining math concepts!
Great video 👍❤️❤️👋
Really useful !!
The way he was fab
I think sir you're position comes in world top 10 tuitor
Awww thanks so much!
Thanks a lot for this video please make more videos for us 🙏
Love from india 🙏❤️
THANK YOU... SIR...!!!
Such useful lesson !!!!
Thank you!
Thanks a lot, very helpful to me🙏❤
Your teaching is so easy to understand. Thanks a lot for the free contents! :)
Times the tens in your head then store it. Times the ones in your head and store that. Then add. But you have to know your times table and your addition facts. This method is faster than a calculator for simpler problems. What’s 8x17? It’s 80+56. What’s 80+56? It’s 100 + 36.
To do the above in your head you need to know 8x7 is 56 and 8+5 is 13.
Yes absolutely!
Thanks sir.
THANK YOU
Welcome!
what is the [ next to “48” for? is it to show its the answer?
Yeah that is just how I circle the answer.
THANKS a lot
Welcome!
4:01 ...Or you could re-write 19 as ( 20 - 1 ), therefore having to calculate next 5 x 20 (which is 100 - easy!) and then subtract 5 from it (which is, again, easy!), thus yielding 95.
I'm quite surprised: Aren't you guys being taught this in elementary school? (i.e. how to quickly and efficiently manipulate numbers in your own mind - and also feel comfortable and confident while doing it)
Nope, I had a terrible elementary teacher, he only taught us the traditional method of multiplying.
I wish I knew this before
Did this my whole life got me in trouble in school this cycle
5.19
3.16
9.13
similar to stacking method, simpler
2.24
(3.10)+(3.6)
4.23
3(10+6)
2(20)+(4)
115
117
i multiply it in my mind
Yes!
@@MathAndScience but when it comes to 79times93 i cannot do those stuff it's like there is no space in my thinking area
(50)+(45)
multiplication
Easy for me
I wish you were my math teacher ……I am 70 yrs old…..am just learning this….I HATED MATH
(40)+(8)
102
48
95
92
98
(30)+(18)
6.17
3.18
(2.20)+(2.4)
5.23
2(20+4)
(9.10)+(9.3)
(5.10)+(5.9)
(80)+(12)
(90)+(27)
115
5(10+9)
117
(30)+(24)
9(10+3)
102
48
95
92
98
7.14
(4.20)+(4.3)
8.16
4(20+3)
5(20+3)
(6.10)+(6.7)
3(10+8)
6(10+7)
128
(100)+(15)
48
(70)+(28)
(60)+(42)
128
48
(80)+(48)
8(10+6)
54
(7.10)+(7.4)
(8.10)+(8.6)
7(10+4)
54
(5.20)+(5.3)
(3.10)+(3.8)