When you ask "What number is halfway between 45 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=45 and Y=153.
To find the number halfway between 45 and 153, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 45 and 153 into our formula, we get:
(45 + 153)/2 = 99
Thus, the number halfway between 45 and 153 is 99.
To check that our answer is correct, we subtract 45 from 99 and subtract 99 from 153 and compare the two numbers:
99 - 45 = 54
153 - 99 = 54
As you can see, the halfway number is 54 higher than 45 and 54 lower than 153. Therefore, our halfway between answer of 99 above is correct.
Halfway Between
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Halfway Between 45 and 154
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