When you ask "What number is halfway between 100 and 525?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=100 and Y=525.
To find the number halfway between 100 and 525, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 100 and 525 into our formula, we get:
(100 + 525)/2 = 312.5
Thus, the number halfway between 100 and 525 is 312.5.
To check that our answer is correct, we subtract 100 from 312.5 and subtract 312.5 from 525 and compare the two numbers:
312.5 - 100 = 212.5
525 - 312.5 = 212.5
As you can see, the halfway number is 212.5 higher than 100 and 212.5 lower than 525. Therefore, our halfway between answer of 312.5 above is correct.
Halfway Between
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Halfway Between 100 and 526
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