When you ask "What number is halfway between 31 and 153?" 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=153.
To find the number halfway between 31 and 153, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 153 into our formula, we get:
(31 + 153)/2 = 92
Thus, the number halfway between 31 and 153 is 92.
To check that our answer is correct, we subtract 31 from 92 and subtract 92 from 153 and compare the two numbers:
92 - 31 = 61
153 - 92 = 61
As you can see, the halfway number is 61 higher than 31 and 61 lower than 153. Therefore, our halfway between answer of 92 above is correct.
Halfway Between
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Halfway Between 31 and 154
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