When you ask "What number is halfway between 70 and 787?" 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=787.
To find the number halfway between 70 and 787, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 787 into our formula, we get:
(70 + 787)/2 = 428.5
Thus, the number halfway between 70 and 787 is 428.5.
To check that our answer is correct, we subtract 70 from 428.5 and subtract 428.5 from 787 and compare the two numbers:
428.5 - 70 = 358.5
787 - 428.5 = 358.5
As you can see, the halfway number is 358.5 higher than 70 and 358.5 lower than 787. Therefore, our halfway between answer of 428.5 above is correct.
Halfway Between
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Halfway Between 70 and 788
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