When you ask "What number is halfway between 49 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=49 and Y=138.
To find the number halfway between 49 and 138, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 49 and 138 into our formula, we get:
(49 + 138)/2 = 93.5
Thus, the number halfway between 49 and 138 is 93.5.
To check that our answer is correct, we subtract 49 from 93.5 and subtract 93.5 from 138 and compare the two numbers:
93.5 - 49 = 44.5
138 - 93.5 = 44.5
As you can see, the halfway number is 44.5 higher than 49 and 44.5 lower than 138. Therefore, our halfway between answer of 93.5 above is correct.
Halfway Between
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Halfway Between 49 and 139
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