When you ask "What number is halfway between 79 and 645?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=79 and Y=645.
To find the number halfway between 79 and 645, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 645 into our formula, we get:
(79 + 645)/2 = 362
Thus, the number halfway between 79 and 645 is 362.
To check that our answer is correct, we subtract 79 from 362 and subtract 362 from 645 and compare the two numbers:
362 - 79 = 283
645 - 362 = 283
As you can see, the halfway number is 283 higher than 79 and 283 lower than 645. Therefore, our halfway between answer of 362 above is correct.
Halfway Between
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Halfway Between 79 and 646
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