When you ask "What number is halfway between 71 and 150?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=71 and Y=150.
To find the number halfway between 71 and 150, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 150 into our formula, we get:
(71 + 150)/2 = 110.5
Thus, the number halfway between 71 and 150 is 110.5.
To check that our answer is correct, we subtract 71 from 110.5 and subtract 110.5 from 150 and compare the two numbers:
110.5 - 71 = 39.5
150 - 110.5 = 39.5
As you can see, the halfway number is 39.5 higher than 71 and 39.5 lower than 150. Therefore, our halfway between answer of 110.5 above is correct.
Halfway Between
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Halfway Between 71 and 151
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