When you ask "What number is halfway between 57 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=57 and Y=154.
To find the number halfway between 57 and 154, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 57 and 154 into our formula, we get:
(57 + 154)/2 = 105.5
Thus, the number halfway between 57 and 154 is 105.5.
To check that our answer is correct, we subtract 57 from 105.5 and subtract 105.5 from 154 and compare the two numbers:
105.5 - 57 = 48.5
154 - 105.5 = 48.5
As you can see, the halfway number is 48.5 higher than 57 and 48.5 lower than 154. Therefore, our halfway between answer of 105.5 above is correct.
Halfway Between
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Halfway Between 57 and 155
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