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Hi ...
Does anyone knows how to Multiply Number 11 With Two Digits Number with Quick way to get the fast results? I give you the way, this apply to anyone who doesn't know yet This is work mostly for the two digit number, example from 10-99, now here's the trick ![]() If you trying to multiply number 11 with any two digits number, the quick way to get the fast result is by sumerize the two digit, and place it between them, for example : 17 * 11, to get the fast results adds the number 1 and number 7 result number 8, then you place the result number (8) in between number 1 and 7, so it will be 187, is it correct? ![]() So it is : 17*11 = 187 Well have a nice try with other numbers ![]() |
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Quote:
![]() Example : 93 x 11 > 9+ 3 = 12 > the result 93x11 = 1023 First digit from 12 : 1 to be add to 9, result 10 |
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I know this since i'm in primary school. Besides, i would like to share another tips.
If wannt know whether one number can be divided by 3, add up the number, if the number after add up can divided by 3, then the number can be divided by 3. Example1 : 34379 > 3+4+3+7+9=26 (26 can not divided by 3, so 34379 can not divided by 3) Example 2 : 44379> 4+$+3+7+9= 27 (27 can be divided by 3, so 44379 can be divided by 3) |
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Quote:
all you must have to do is only adding the first digit if you have 2 digit results you should try experience by yourself ![]() The example from your example : 93 x 11 > 9+ 3 = 12 > Add 9 with first digit of the result which is one, then it should be 10 after that, leave the second digit behind it, so it will be 102, place it right before the last digit from 93, and it is 3 so the result will be 1023 same as 93x11 = 1023 ![]() simple formula 93 > 9+3 = 12 --> 1 & 2 ....... 9 .... (+1) .... 2 ....3 .... --> 10..2..3 --> 1023 RESULT |
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Quote:
"Example : 93 x 11 > 9+ 3 = 12 > the result 93x11 = 1023 > multiplication only for comparison First digit from 12 : 1 to be add to 9, result 10" if sum of 2 digit result is also 2 digit, then first digit from sum must add to first digit chosen and 2nd digit from sum still remain as middle number ![]() |
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I've got this trick when I was still elementary school student...
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| trick math |
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