When you ask "What number is halfway between 99 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=99 and Y=148.
To find the number halfway between 99 and 148, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 148 into our formula, we get:
(99 + 148)/2 = 123.5
Thus, the number halfway between 99 and 148 is 123.5.
To check that our answer is correct, we subtract 99 from 123.5 and subtract 123.5 from 148 and compare the two numbers:
123.5 - 99 = 24.5
148 - 123.5 = 24.5
As you can see, the halfway number is 24.5 higher than 99 and 24.5 lower than 148. Therefore, our halfway between answer of 123.5 above is correct.
Halfway Between
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Halfway Between 99 and 149
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