When you ask "What number is halfway between 7 and 321?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=321.
To find the number halfway between 7 and 321, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 321 into our formula, we get:
(7 + 321)/2 = 164
Thus, the number halfway between 7 and 321 is 164.
To check that our answer is correct, we subtract 7 from 164 and subtract 164 from 321 and compare the two numbers:
164 - 7 = 157
321 - 164 = 157
As you can see, the halfway number is 157 higher than 7 and 157 lower than 321. Therefore, our halfway between answer of 164 above is correct.
Halfway Between
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Halfway Between 7 and 322
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