When you ask "What number is halfway between 89 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=89 and Y=148.
To find the number halfway between 89 and 148, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 89 and 148 into our formula, we get:
(89 + 148)/2 = 118.5
Thus, the number halfway between 89 and 148 is 118.5.
To check that our answer is correct, we subtract 89 from 118.5 and subtract 118.5 from 148 and compare the two numbers:
118.5 - 89 = 29.5
148 - 118.5 = 29.5
As you can see, the halfway number is 29.5 higher than 89 and 29.5 lower than 148. Therefore, our halfway between answer of 118.5 above is correct.
Halfway Between
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Halfway Between 89 and 149
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