When you ask "What number is halfway between 77 and 157?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=77 and Y=157.
To find the number halfway between 77 and 157, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 157 into our formula, we get:
(77 + 157)/2 = 117
Thus, the number halfway between 77 and 157 is 117.
To check that our answer is correct, we subtract 77 from 117 and subtract 117 from 157 and compare the two numbers:
117 - 77 = 40
157 - 117 = 40
As you can see, the halfway number is 40 higher than 77 and 40 lower than 157. Therefore, our halfway between answer of 117 above is correct.
Halfway Between
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Halfway Between 77 and 158
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