When you ask "What number is halfway between 70 and 275?" 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=275.
To find the number halfway between 70 and 275, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 275 into our formula, we get:
(70 + 275)/2 = 172.5
Thus, the number halfway between 70 and 275 is 172.5.
To check that our answer is correct, we subtract 70 from 172.5 and subtract 172.5 from 275 and compare the two numbers:
172.5 - 70 = 102.5
275 - 172.5 = 102.5
As you can see, the halfway number is 102.5 higher than 70 and 102.5 lower than 275. Therefore, our halfway between answer of 172.5 above is correct.
Halfway Between
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Halfway Between 70 and 276
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