When you ask "What number is halfway between 7 and 309?" 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=309.
To find the number halfway between 7 and 309, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 309 into our formula, we get:
(7 + 309)/2 = 158
Thus, the number halfway between 7 and 309 is 158.
To check that our answer is correct, we subtract 7 from 158 and subtract 158 from 309 and compare the two numbers:
158 - 7 = 151
309 - 158 = 151
As you can see, the halfway number is 151 higher than 7 and 151 lower than 309. Therefore, our halfway between answer of 158 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 7 and 310
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