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345 x 18 = 690 x 9 = 6210 . 345 x 18 = (345 x 20) - (345 x 2) = 6900 - 690 = 6210 . 345 x 18 = (345 x 10) + (345 x 8) = 3450 + 2760 = 6210 . 5. 1 4. 5 8 3. 4. 40 3. 32 24 3. 28. 37 40 V V V 6 2 1 0 <== .

but if you have a whiteboard and a marker/pencil, its not any different than just doing it the regular way the real trick is doing it in your head, 012 013 x------ in your head -> 2x3=6, 2+3 = 5, 1x1 = 1 of course i started with the 1's column first, so just reverse, 156

i am stuck in the walls of the ones place. the nightmare is coming. i am stuck in the walls of the ones place. do not talk to the one in the ones place

SECOND GRADE SECOND GRADE!!!!!!

WHY?!??! YOU MAKE ME GONE MAD!!!!!!!!!!

WHY

you should of started making caveman sounds and farting politely

You should of shown a variety of numbers, two digit and three digit multiplication maybe even 4 digit 😊

8 years no other post.

This is great

As a japanese, I have never seen this wethod. However, its interesting.

Mam its quite fascinating, infact your way of explaining its amazing ...Thank a ton for sharing this trick.

I don't understand why people need this. Never needed it in school and I have ADHD and I consider myself an average mind. I could calculate thiese things in my head in no time eversince we learned the big multiplication table.. which was in what? 3rd grade or whatever. I was maybe 6 or 7 years old. More like 7 or 8 actually. By the time you counted to 63 I had already calculated the multiplication in my head for the 3rd time and by the time I would finish counting 63 places I would have to count again because I probably miscounted.

Why doesn't America do this because this is way easier even a dumbass like me could have done this without a calculator as long as I had a sheet of paper

It’s interesting but so very inefficient.

I never liked math but I love this method and I'm going to teach it to my children.

I need more detail on counting the inner sections. I need you to slow down and zoom in on what your touching and counting please

It maybe nice but calculator is faster.

This has a lot of logic…but drawing all those lines…damn! Imagine calculating 99999999 x 99999999 😂

Wow, I wish they taught this method in my school.

Great, now I know that I suck at math in two langauges...

What if you had a 3 digit number, also are you gonna draw 9 lines if the number was like 99×99

General Kenobi

Me as Indonesian admit the best method for math is India (Hindi) method.

I love this! Though I'd need a MUCH bigger paper if the math was smth like 52,087 x 3827 Just saying 😂

Much easier. NOT. Still crazy amazing though.

Hai

I shall now be smarter starting today

Thanks

I was today old when I learned this!! 55 years old. Amazing!!

703 the answer

345 the answer 15×23

You got simple answer in multiply

12×13=156

This knowledge will be used to confuse my teacher

How do I add *.5?

You should be my teacher

102×103= how can do use this method

Why didn’t they teach me thos

Nice

Awesome lol thanks for this video. I couldn’t figure out how to use this solution with digits over 4

so does it mean japanese people still uses this method? 🤨

Are the steps the same for single and triple digit numbers like 8x4 or 125x144 or is there different methods if so do you know where I can find a video explaining it?

Does it matter which angle you start your diagonal lines from left top corner to bottom right or upper right to bottom left and does the first digit on both numbers always go above the second digits lines would it matter

This takes away allll thinking lol

This is the sutupidest thing I ever saw

Why is it called the Japanese multiplication strategy?

Me.. 740-37. This person let me draw this huge ass picture to solve easy mental math and increase the chance of making a mistake while also taking more time than just doing 37*20-37 in your head

Thx