When you ask "What number is halfway between 7 and 153?" 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=153.
To find the number halfway between 7 and 153, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 153 into our formula, we get:
(7 + 153)/2 = 80
Thus, the number halfway between 7 and 153 is 80.
To check that our answer is correct, we subtract 7 from 80 and subtract 80 from 153 and compare the two numbers:
80 - 7 = 73
153 - 80 = 73
As you can see, the halfway number is 73 higher than 7 and 73 lower than 153. Therefore, our halfway between answer of 80 above is correct.
Halfway Between
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Halfway Between 7 and 154
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