When you ask "What number is halfway between 79 and 920?" 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=920.
To find the number halfway between 79 and 920, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 920 into our formula, we get:
(79 + 920)/2 = 499.5
Thus, the number halfway between 79 and 920 is 499.5.
To check that our answer is correct, we subtract 79 from 499.5 and subtract 499.5 from 920 and compare the two numbers:
499.5 - 79 = 420.5
920 - 499.5 = 420.5
As you can see, the halfway number is 420.5 higher than 79 and 420.5 lower than 920. Therefore, our halfway between answer of 499.5 above is correct.
Halfway Between
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Halfway Between 79 and 921
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