When you ask "What number is halfway between 9 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=9 and Y=157.
To find the number halfway between 9 and 157, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 157 into our formula, we get:
(9 + 157)/2 = 83
Thus, the number halfway between 9 and 157 is 83.
To check that our answer is correct, we subtract 9 from 83 and subtract 83 from 157 and compare the two numbers:
83 - 9 = 74
157 - 83 = 74
As you can see, the halfway number is 74 higher than 9 and 74 lower than 157. Therefore, our halfway between answer of 83 above is correct.
Halfway Between
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Halfway Between 9 and 158
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