Category archives for: Math Tricks

Multiplication Tips

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Multiplying by five Jenny Logwood writes: Here is an easy way to find an answer to a 5 times question.If you are multiplying 5 times an even number: halve the number you are multiplying by and place a zero after the number. Example: 5 × 6, half of 6 is 3, add a zero for [...]

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2:46 AM | Posted in Beat the Calculator | Read More »

Multiplying a two-digit number by 11

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For instance, suppose you wanted to multiple 43 x 11. Well, you may be able to solve this problem in your head already if you realize that you can first multiply 43 by 10, and then adding 43 to the result. Sure enough, the answer is 473. This works relatively quickly, but there is another [...]

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7:59 PM | Posted in Beat the Calculator | Read More »
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