When you ask "What number is halfway between 42 and 156?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=156.
To find the number halfway between 42 and 156, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 156 into our formula, we get:
(42 + 156)/2 = 99
Thus, the number halfway between 42 and 156 is 99.
To check that our answer is correct, we subtract 42 from 99 and subtract 99 from 156 and compare the two numbers:
99 - 42 = 57
156 - 99 = 57
As you can see, the halfway number is 57 higher than 42 and 57 lower than 156. Therefore, our halfway between answer of 99 above is correct.
Halfway Between
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Halfway Between 42 and 157
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