When you ask "What number is halfway between 79 and 320?" 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=320.
To find the number halfway between 79 and 320, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 320 into our formula, we get:
(79 + 320)/2 = 199.5
Thus, the number halfway between 79 and 320 is 199.5.
To check that our answer is correct, we subtract 79 from 199.5 and subtract 199.5 from 320 and compare the two numbers:
199.5 - 79 = 120.5
320 - 199.5 = 120.5
As you can see, the halfway number is 120.5 higher than 79 and 120.5 lower than 320. Therefore, our halfway between answer of 199.5 above is correct.
Halfway Between
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Halfway Between 79 and 321
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