When you ask "What number is halfway between 54 and 144?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=54 and Y=144.
To find the number halfway between 54 and 144, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 54 and 144 into our formula, we get:
(54 + 144)/2 = 99
Thus, the number halfway between 54 and 144 is 99.
To check that our answer is correct, we subtract 54 from 99 and subtract 99 from 144 and compare the two numbers:
99 - 54 = 45
144 - 99 = 45
As you can see, the halfway number is 45 higher than 54 and 45 lower than 144. Therefore, our halfway between answer of 99 above is correct.
Halfway Between
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Halfway Between 54 and 145
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