this post from my arguably fad to modify or whatever his name was a quick
calculation (I understand not a math expert, so do not so understand the terms
in the field of mathematics). which
obviously I love that his name is already on the math since elementary school
so very keen to work on deeper mathematical (computer was tampered with). old
post once I described the rapid multiplication of the last digit 5, well now
I'm trying to calculate how fast said fellow twin figures. is
meant here is the twin numbers 11,22,33 and so on.And this calculation is only
valid for twin 2-digit numbers for the three digits that have not yet found a
way.
we just start my presentation.
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. Example 9 ² = 81.
Example 1:
22 x 22 = ......?
answer =
multiplication stacking down:
22
22 x
---
44
44 +
---
484
fast way:
1. enough for the results you multiply the numbers behind the numbers behind each other, ie 2 x 2 = 4.
2. to the results of the middle figure we use the formula (numbers matter) ² x 2b= 2 ² x 2 = 8
3. enough for the results of the numbers we multiply his fellow numbers ie 2 x 2 = 4.
so the result of multiplying 22 x 22 = 484
if multiplication method 1 and 2 more than 1 digit then used save system.
Example 2:
66 x 66 = ......?
rapid multiplication is:
1. for the results we multiply the numbers behind the numbers behind fellow is 6 x 6 = 36. used number 6, number 3 is saved for the middle digit results.
2. to the results of the middle figure we use the formula (numbers matter) ² x 2 = 6 ² x 2 = 36 x 2 = 72, then added with a savings rate 72 + 3 = 75. used number 5, while the number 7 is stored for future results figures.
3. to the results of the numbers we multiply the numbers others are 6 x 6 = 36, then save the results added 36 + 7 = 43
so the total yield is 4356 (please check using a calculator)
ok just practicing safe ..... @ _ ~
source: my creative thoughts and ideas
supporting tools: brain, pen, paper, calculator (for the comparator), the computer to type this post.
we just start my presentation.
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. Example 9 ² = 81.
Example 1:
22 x 22 = ......?
answer =
multiplication stacking down:
22
22 x
---
44
44 +
---
484
fast way:
1. enough for the results you multiply the numbers behind the numbers behind each other, ie 2 x 2 = 4.
2. to the results of the middle figure we use the formula (numbers matter) ² x 2b= 2 ² x 2 = 8
3. enough for the results of the numbers we multiply his fellow numbers ie 2 x 2 = 4.
so the result of multiplying 22 x 22 = 484
if multiplication method 1 and 2 more than 1 digit then used save system.
Example 2:
66 x 66 = ......?
rapid multiplication is:
1. for the results we multiply the numbers behind the numbers behind fellow is 6 x 6 = 36. used number 6, number 3 is saved for the middle digit results.
2. to the results of the middle figure we use the formula (numbers matter) ² x 2 = 6 ² x 2 = 36 x 2 = 72, then added with a savings rate 72 + 3 = 75. used number 5, while the number 7 is stored for future results figures.
3. to the results of the numbers we multiply the numbers others are 6 x 6 = 36, then save the results added 36 + 7 = 43
so the total yield is 4356 (please check using a calculator)
ok just practicing safe ..... @ _ ~
source: my creative thoughts and ideas
supporting tools: brain, pen, paper, calculator (for the comparator), the computer to type this post.
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