When you ask "What number is halfway between 7 and 257?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=257.
To find the number halfway between 7 and 257, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 257 into our formula, we get:
(7 + 257)/2 = 132
Thus, the number halfway between 7 and 257 is 132.
To check that our answer is correct, we subtract 7 from 132 and subtract 132 from 257 and compare the two numbers:
132 - 7 = 125
257 - 132 = 125
As you can see, the halfway number is 125 higher than 7 and 125 lower than 257. Therefore, our halfway between answer of 132 above is correct.
Halfway Between
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Halfway Between 7 and 258
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