When you ask "What number is halfway between 81 and 148?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=81 and Y=148.
To find the number halfway between 81 and 148, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 148 into our formula, we get:
(81 + 148)/2 = 114.5
Thus, the number halfway between 81 and 148 is 114.5.
To check that our answer is correct, we subtract 81 from 114.5 and subtract 114.5 from 148 and compare the two numbers:
114.5 - 81 = 33.5
148 - 114.5 = 33.5
As you can see, the halfway number is 33.5 higher than 81 and 33.5 lower than 148. Therefore, our halfway between answer of 114.5 above is correct.
Halfway Between
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Halfway Between 81 and 149
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