When you ask "What number is halfway between 88 and 155?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=155.
To find the number halfway between 88 and 155, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 155 into our formula, we get:
(88 + 155)/2 = 121.5
Thus, the number halfway between 88 and 155 is 121.5.
To check that our answer is correct, we subtract 88 from 121.5 and subtract 121.5 from 155 and compare the two numbers:
121.5 - 88 = 33.5
155 - 121.5 = 33.5
As you can see, the halfway number is 33.5 higher than 88 and 33.5 lower than 155. Therefore, our halfway between answer of 121.5 above is correct.
Halfway Between
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Halfway Between 88 and 156
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