Halfway Between 100 and 138

When you ask "What number is halfway between 100 and 138?" 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=138.

Halfway Between Line

To find the number halfway between 100 and 138, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 138 into our formula, we get:

(100 + 138)/2 = 119

Thus, the number halfway between 100 and 138 is 119.

To check that our answer is correct, we subtract 100 from 119 and subtract 119 from 138 and compare the two numbers:

119 - 100 = 19
138 - 119 = 19

As you can see, the halfway number is 19 higher than 100 and 19 lower than 138. Therefore, our halfway between answer of 119 above is correct.

Halfway Between
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Halfway Between 100 and 139
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