When you ask "What number is halfway between 99 and 145?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=99 and Y=145.
To find the number halfway between 99 and 145, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 145 into our formula, we get:
(99 + 145)/2 = 122
Thus, the number halfway between 99 and 145 is 122.
To check that our answer is correct, we subtract 99 from 122 and subtract 122 from 145 and compare the two numbers:
122 - 99 = 23
145 - 122 = 23
As you can see, the halfway number is 23 higher than 99 and 23 lower than 145. Therefore, our halfway between answer of 122 above is correct.
Halfway Between
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Halfway Between 99 and 146
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