When you ask "What number is halfway between 42 and 151?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=151.
To find the number halfway between 42 and 151, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 151 into our formula, we get:
(42 + 151)/2 = 96.5
Thus, the number halfway between 42 and 151 is 96.5.
To check that our answer is correct, we subtract 42 from 96.5 and subtract 96.5 from 151 and compare the two numbers:
96.5 - 42 = 54.5
151 - 96.5 = 54.5
As you can see, the halfway number is 54.5 higher than 42 and 54.5 lower than 151. Therefore, our halfway between answer of 96.5 above is correct.
Halfway Between
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Halfway Between 42 and 152
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