When you ask "What number is halfway between 77 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=77 and Y=148.
To find the number halfway between 77 and 148, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 148 into our formula, we get:
(77 + 148)/2 = 112.5
Thus, the number halfway between 77 and 148 is 112.5.
To check that our answer is correct, we subtract 77 from 112.5 and subtract 112.5 from 148 and compare the two numbers:
112.5 - 77 = 35.5
148 - 112.5 = 35.5
As you can see, the halfway number is 35.5 higher than 77 and 35.5 lower than 148. Therefore, our halfway between answer of 112.5 above is correct.
Halfway Between
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Halfway Between 77 and 149
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