What number is 3 less than 31?

When solving a question like "What number is 3 less than 31?", take a close look at what it is really asking.

You have the number 31 and you are looking for a number that is 3 less than 31. In other words, if you have 31 and take away 3, then how many do you have?

You guessed it! This is a subtraction problem. 31 is the minuend and 3 is subtrahend and the answer we are looking for is the difference.

Therefore, to solve "What number is 3 less than 31?", you subtract 3 from 31 like so:

31 - 3 = 28

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