Halfway Between 45 and 155

When you ask "What number is halfway between 45 and 155?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=45 and Y=155.

Halfway Between Line

To find the number halfway between 45 and 155, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 45 and 155 into our formula, we get:

(45 + 155)/2 = 100

Thus, the number halfway between 45 and 155 is 100.

To check that our answer is correct, we subtract 45 from 100 and subtract 100 from 155 and compare the two numbers:

100 - 45 = 55
155 - 100 = 55

As you can see, the halfway number is 55 higher than 45 and 55 lower than 155. Therefore, our halfway between answer of 100 above is correct.

Halfway Between
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Halfway Between 45 and 156
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