When you ask "What number is halfway between 42 and 158?" 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=158.
To find the number halfway between 42 and 158, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 158 into our formula, we get:
(42 + 158)/2 = 100
Thus, the number halfway between 42 and 158 is 100.
To check that our answer is correct, we subtract 42 from 100 and subtract 100 from 158 and compare the two numbers:
100 - 42 = 58
158 - 100 = 58
As you can see, the halfway number is 58 higher than 42 and 58 lower than 158. Therefore, our halfway between answer of 100 above is correct.
Halfway Between
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Halfway Between 42 and 159
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