When you ask "What number is halfway between 61 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=61 and Y=155.
To find the number halfway between 61 and 155, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 61 and 155 into our formula, we get:
(61 + 155)/2 = 108
Thus, the number halfway between 61 and 155 is 108.
To check that our answer is correct, we subtract 61 from 108 and subtract 108 from 155 and compare the two numbers:
108 - 61 = 47
155 - 108 = 47
As you can see, the halfway number is 47 higher than 61 and 47 lower than 155. Therefore, our halfway between answer of 108 above is correct.
Halfway Between
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Halfway Between 61 and 156
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