When you ask "What number is halfway between 7 and 279?" 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=279.
To find the number halfway between 7 and 279, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 279 into our formula, we get:
(7 + 279)/2 = 143
Thus, the number halfway between 7 and 279 is 143.
To check that our answer is correct, we subtract 7 from 143 and subtract 143 from 279 and compare the two numbers:
143 - 7 = 136
279 - 143 = 136
As you can see, the halfway number is 136 higher than 7 and 136 lower than 279. Therefore, our halfway between answer of 143 above is correct.
Halfway Between
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Halfway Between 7 and 280
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