When you ask "What number is halfway between 70 and 555?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=70 and Y=555.
To find the number halfway between 70 and 555, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 555 into our formula, we get:
(70 + 555)/2 = 312.5
Thus, the number halfway between 70 and 555 is 312.5.
To check that our answer is correct, we subtract 70 from 312.5 and subtract 312.5 from 555 and compare the two numbers:
312.5 - 70 = 242.5
555 - 312.5 = 242.5
As you can see, the halfway number is 242.5 higher than 70 and 242.5 lower than 555. Therefore, our halfway between answer of 312.5 above is correct.
Halfway Between
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Halfway Between 70 and 556
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