My post this time is a sequel of my previous post entitled rapid multiplication fellow twin two-digit numbers. After
so many years I was inspired to write a post about the sequel multiplication
digit number triplets. and
the actual formula for rapid multiplication of three-digit numbers twins is not
much different from the previous post. try listening to the steps:
1. to be more smoothly understand and practice the quick count is a good idea to have a grasp of all the multiplication, addition and multiplication square, from zero up to the number nine. Example 9 ² = 81.
2. Provide calculators, books and stationery for comparison only.
3. Do not forget to read bismillah before starting.
Example 1: 111 x 111 = 12321
1. to be more smoothly understand and practice the quick count is a good idea to have a grasp of all the multiplication, addition and multiplication square, from zero up to the number nine. Example 9 ² = 81.
2. Provide calculators, books and stationery for comparison only.
3. Do not forget to read bismillah before starting.
Example 1: 111 x 111 = 12321
usual way: 111
111x
111
111
111 +
12321
Fast way:
111 x 111 = 12321
a. we will start from the last digit that is, the number one rank two equals one, 1 ² = 1
b. then the results of two recent figures, formula 1 ² +1 ² = 2
c. then for the final results of the third figure, the formula 1 ² + 1 ² + 1 ² = 3
d. for the final results of the fourth digit, the formula is the same as step B. 2 results
e. for the results of the first number, the formula is the same as step A. result 1
how to make it easy?
but if the result of double-digit rank second to none, we enforce the system store.
Example 2:
777 x 777 =
a. 7 ² = 49, mean we save 4 9 results
b. 7 ² + 7 ² = 49 + 49 = 98 is added to the 4 = 102, so the result is 2 save 10
c. 7 ² + 7 ² + 7 ² = 49 + 49 + 49 = 147ditambahkan with 10 = 157, so the result is 7 save 15
d. same way as B but with the savings add up how C, 98 + 15 = 113, so the result is 3 shelf 11.
e. same way as A, but the savings add up how D, 49 + 11 = 60
the end result we sort of E to A is 603 729.
to 555 x 555 if we could use the two-way fast this way too fast multiplication by the last digit five.
Good luck ......
Fast way:
111 x 111 = 12321
a. we will start from the last digit that is, the number one rank two equals one, 1 ² = 1
b. then the results of two recent figures, formula 1 ² +1 ² = 2
c. then for the final results of the third figure, the formula 1 ² + 1 ² + 1 ² = 3
d. for the final results of the fourth digit, the formula is the same as step B. 2 results
e. for the results of the first number, the formula is the same as step A. result 1
how to make it easy?
but if the result of double-digit rank second to none, we enforce the system store.
Example 2:
777 x 777 =
a. 7 ² = 49, mean we save 4 9 results
b. 7 ² + 7 ² = 49 + 49 = 98 is added to the 4 = 102, so the result is 2 save 10
c. 7 ² + 7 ² + 7 ² = 49 + 49 + 49 = 147ditambahkan with 10 = 157, so the result is 7 save 15
d. same way as B but with the savings add up how C, 98 + 15 = 113, so the result is 3 shelf 11.
e. same way as A, but the savings add up how D, 49 + 11 = 60
the end result we sort of E to A is 603 729.
to 555 x 555 if we could use the two-way fast this way too fast multiplication by the last digit five.
Good luck ......
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