When you ask "What number is halfway between 70 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=70 and Y=257.
To find the number halfway between 70 and 257, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 257 into our formula, we get:
(70 + 257)/2 = 163.5
Thus, the number halfway between 70 and 257 is 163.5.
To check that our answer is correct, we subtract 70 from 163.5 and subtract 163.5 from 257 and compare the two numbers:
163.5 - 70 = 93.5
257 - 163.5 = 93.5
As you can see, the halfway number is 93.5 higher than 70 and 93.5 lower than 257. Therefore, our halfway between answer of 163.5 above is correct.
Halfway Between
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Halfway Between 70 and 258
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