When you ask "What number is halfway between 56 and 155?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=56 and Y=155.
To find the number halfway between 56 and 155, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 56 and 155 into our formula, we get:
(56 + 155)/2 = 105.5
Thus, the number halfway between 56 and 155 is 105.5.
To check that our answer is correct, we subtract 56 from 105.5 and subtract 105.5 from 155 and compare the two numbers:
105.5 - 56 = 49.5
155 - 105.5 = 49.5
As you can see, the halfway number is 49.5 higher than 56 and 49.5 lower than 155. Therefore, our halfway between answer of 105.5 above is correct.
Halfway Between
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Halfway Between 56 and 156
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