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Free Tips to do Mental Arithmetic Questions Easy in 2011- Part 5 This is my fifth blog of tricks to do well in math problems. Please find some good tips to do math questions easy. These tricks are easy to remember to do all math calculations: Blog-1-Tips to do Mental Math Questions Easy Blog 2-Free Tips to do Mental Math Questions Easy in 2011 Blog 3-Mental Math Questions Easy Blog 4-Fast Arithmetic Tips 31. Math: 9X Rule To multiply by 9, try this: (1) Spread your two hands out and place them on a desk or table in front of you. (2) To multiply by 3, fold down the 3rd finger from the left. To multiply by 4, it would be the 4th finger and so on. (3) The answer is 27 ... READ it from the two fingers on the left of the folded down finger and the 7 fingers on the right of it. This works for anything up to 9x10! 32. Easy Division by 5 Often, instead of dividing by 5, it is more convenient to multiply first by 2 and then divi...

Please find some tips to math questions easy. These tricks are easy to remember to do all match calculations. Everybody knows that if we want to multiply with any number with 10 or 100 you just add one or two 0 after that number. E.g. if you multiply 39 with 10, you just add one 0 to 39 to become 390. Here goes, the first one is easy. 1. To multiply any number by 4 all you do is double it, and then double it again. Example: 16 X 4. First Double the 16: 16 X 2 = 32 Then Double the 32: 36 X 2 = 64 2. To multiply any number by 5, just divide the number by 2, and then re-affix any necessary decimal points or zeroes. Example: 56 X 5. First Divide: 56 ÷ 2 = 28. Then Make sense? 18 is obviously too small to be the answer to 56 X 5. It's clear that the answer is somewhere in the 100s. So you add a zero to the 18 and you have the correct answer – 280.   3. To multiply by 9 An easy one - Simply multiply the number by 10, and then su...