When you ask "What number is halfway between 72 and 170?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=72 and Y=170.
To find the number halfway between 72 and 170, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 170 into our formula, we get:
(72 + 170)/2 = 121
Thus, the number halfway between 72 and 170 is 121.
To check that our answer is correct, we subtract 72 from 121 and subtract 121 from 170 and compare the two numbers:
121 - 72 = 49
170 - 121 = 49
As you can see, the halfway number is 49 higher than 72 and 49 lower than 170. Therefore, our halfway between answer of 121 above is correct.
Halfway Between
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Halfway Between 72 and 171
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