When you ask "What number is halfway between 71 and 142?" 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=142.
To find the number halfway between 71 and 142, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 142 into our formula, we get:
(71 + 142)/2 = 106.5
Thus, the number halfway between 71 and 142 is 106.5.
To check that our answer is correct, we subtract 71 from 106.5 and subtract 106.5 from 142 and compare the two numbers:
106.5 - 71 = 35.5
142 - 106.5 = 35.5
As you can see, the halfway number is 35.5 higher than 71 and 35.5 lower than 142. Therefore, our halfway between answer of 106.5 above is correct.
Halfway Between
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Halfway Between 71 and 143
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