When you ask "What number is halfway between 7 and 150?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=150.
To find the number halfway between 7 and 150, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 150 into our formula, we get:
(7 + 150)/2 = 78.5
Thus, the number halfway between 7 and 150 is 78.5.
To check that our answer is correct, we subtract 7 from 78.5 and subtract 78.5 from 150 and compare the two numbers:
78.5 - 7 = 71.5
150 - 78.5 = 71.5
As you can see, the halfway number is 71.5 higher than 7 and 71.5 lower than 150. Therefore, our halfway between answer of 78.5 above is correct.
Halfway Between
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Halfway Between 7 and 151
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