When you ask "What number is halfway between 60 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=60 and Y=138.
To find the number halfway between 60 and 138, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 60 and 138 into our formula, we get:
(60 + 138)/2 = 99
Thus, the number halfway between 60 and 138 is 99.
To check that our answer is correct, we subtract 60 from 99 and subtract 99 from 138 and compare the two numbers:
99 - 60 = 39
138 - 99 = 39
As you can see, the halfway number is 39 higher than 60 and 39 lower than 138. Therefore, our halfway between answer of 99 above is correct.
Halfway Between
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Halfway Between 60 and 139
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