When you ask "What number is halfway between 87 and 153?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=87 and Y=153.
To find the number halfway between 87 and 153, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 153 into our formula, we get:
(87 + 153)/2 = 120
Thus, the number halfway between 87 and 153 is 120.
To check that our answer is correct, we subtract 87 from 120 and subtract 120 from 153 and compare the two numbers:
120 - 87 = 33
153 - 120 = 33
As you can see, the halfway number is 33 higher than 87 and 33 lower than 153. Therefore, our halfway between answer of 120 above is correct.
Halfway Between
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Halfway Between 87 and 154
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