When you ask "What number is halfway between 71 and 154?" 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=154.
To find the number halfway between 71 and 154, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 154 into our formula, we get:
(71 + 154)/2 = 112.5
Thus, the number halfway between 71 and 154 is 112.5.
To check that our answer is correct, we subtract 71 from 112.5 and subtract 112.5 from 154 and compare the two numbers:
112.5 - 71 = 41.5
154 - 112.5 = 41.5
As you can see, the halfway number is 41.5 higher than 71 and 41.5 lower than 154. Therefore, our halfway between answer of 112.5 above is correct.
Halfway Between
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Halfway Between 71 and 155
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