When you ask "What number is halfway between 54 and 149?" 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=149.
To find the number halfway between 54 and 149, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 54 and 149 into our formula, we get:
(54 + 149)/2 = 101.5
Thus, the number halfway between 54 and 149 is 101.5.
To check that our answer is correct, we subtract 54 from 101.5 and subtract 101.5 from 149 and compare the two numbers:
101.5 - 54 = 47.5
149 - 101.5 = 47.5
As you can see, the halfway number is 47.5 higher than 54 and 47.5 lower than 149. Therefore, our halfway between answer of 101.5 above is correct.
Halfway Between
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Halfway Between 54 and 150
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