When you ask "What number is halfway between 9 and 133?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=9 and Y=133.
To find the number halfway between 9 and 133, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 133 into our formula, we get:
(9 + 133)/2 = 71
Thus, the number halfway between 9 and 133 is 71.
To check that our answer is correct, we subtract 9 from 71 and subtract 71 from 133 and compare the two numbers:
71 - 9 = 62
133 - 71 = 62
As you can see, the halfway number is 62 higher than 9 and 62 lower than 133. Therefore, our halfway between answer of 71 above is correct.
Halfway Between
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Halfway Between 9 and 134
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