When you ask "What number is halfway between 7 and 542?" 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=542.
To find the number halfway between 7 and 542, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 542 into our formula, we get:
(7 + 542)/2 = 274.5
Thus, the number halfway between 7 and 542 is 274.5.
To check that our answer is correct, we subtract 7 from 274.5 and subtract 274.5 from 542 and compare the two numbers:
274.5 - 7 = 267.5
542 - 274.5 = 267.5
As you can see, the halfway number is 267.5 higher than 7 and 267.5 lower than 542. Therefore, our halfway between answer of 274.5 above is correct.
Halfway Between
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Halfway Between 7 and 543
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