Japanese Long Multiplication

4 x 5 20 yon kakeru go wa nijyu よんかけるごは二十 四掛ける五は虹湯.

Japanese long multiplication. Here are three multiplication examples for you to practice. When we say 3 times 2 that is the same as saying 3 groups of 2 and we can show these three groups as 3 rows and 2 columns or 3 columns and two rows. This amazing multiplication trick possible has it s origins in japan although i have heard arguements it is a vedic math trick. There are four smaller products you calculate along the way.

The japanese multiplication method is really just a visual way of representing those four steps. This multiplication works better for all the two digit multiples and multiplicand. Draw sets of parallel lines representing each digit of the firs. Why does the japanese multiplication method work.

Think about how you would calculate 12 32 using the standard method for long multiplication. You re right i m talking about an array. While the user jesslouisec calls the method japanese multiplication and some mathematicians say it s vedic. However you never know when you ll need to do quick math and the japanese multiplication method also called multiply by lines can help you figure out the answer.

9 x 9 81 kyu kakeru kyu wa hachijyu ici. Multiplication last but not least we ll use the term kakeru for multiplication. Let us see with an example 12 x 31 372 visual explanation using lines draw the equivalent lines for the digits. Here is an interesting method to visualize multiplication that reduces it to simple counting.

In order to understand how japanese multiplication works we must start back at the good old reliable method of organizing equal groups in rows and columns. Either way this trick allo. A tiktok video of a novel ancient multiplication method has gone viral.