INSTANT MULTIPLICATION BY ELVEN
Let’s begin with one of my favorite
feats of mental math—how to multiply, in your head, any two-digit number by
eleven. It’s very easy once you know the secret. Consider the problem:
32 *11
To solve this problem, simply add the
digits, 3+2 =5
put the 5 between the 3 and the 2,
and there is your answer: 352
What could be easier? Now you try:
53 *11
Since 5 +3 =8, your answer is...
Thursday, May 29, 2014
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