What number is 31 less than 91?

When solving a question like "What number is 31 less than 91?", take a close look at what it is really asking.

You have the number 91 and you are looking for a number that is 31 less than 91. In other words, if you have 91 and take away 31, then how many do you have?

You guessed it! This is a subtraction problem. 91 is the minuend and 31 is subtrahend and the answer we are looking for is the difference.

Therefore, to solve "What number is 31 less than 91?", you subtract 31 from 91 like so:

91 - 31 = 60

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What number is 31 less than 92?
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