When you ask "What number is halfway between 31 and 552?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=31 and Y=552.
To find the number halfway between 31 and 552, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 552 into our formula, we get:
(31 + 552)/2 = 291.5
Thus, the number halfway between 31 and 552 is 291.5.
To check that our answer is correct, we subtract 31 from 291.5 and subtract 291.5 from 552 and compare the two numbers:
291.5 - 31 = 260.5
552 - 291.5 = 260.5
As you can see, the halfway number is 260.5 higher than 31 and 260.5 lower than 552. Therefore, our halfway between answer of 291.5 above is correct.
Halfway Between
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Halfway Between 31 and 553
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