When you ask "What number is halfway between 4 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=4 and Y=157.
To find the number halfway between 4 and 157, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 157 into our formula, we get:
(4 + 157)/2 = 80.5
Thus, the number halfway between 4 and 157 is 80.5.
To check that our answer is correct, we subtract 4 from 80.5 and subtract 80.5 from 157 and compare the two numbers:
80.5 - 4 = 76.5
157 - 80.5 = 76.5
As you can see, the halfway number is 76.5 higher than 4 and 76.5 lower than 157. Therefore, our halfway between answer of 80.5 above is correct.
Halfway Between
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Halfway Between 4 and 158
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