When you ask "What number is halfway between 84 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=84 and Y=149.
To find the number halfway between 84 and 149, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 149 into our formula, we get:
(84 + 149)/2 = 116.5
Thus, the number halfway between 84 and 149 is 116.5.
To check that our answer is correct, we subtract 84 from 116.5 and subtract 116.5 from 149 and compare the two numbers:
116.5 - 84 = 32.5
149 - 116.5 = 32.5
As you can see, the halfway number is 32.5 higher than 84 and 32.5 lower than 149. Therefore, our halfway between answer of 116.5 above is correct.
Halfway Between
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Halfway Between 84 and 150
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