When you ask "What number is halfway between 70 and 345?" 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=345.
To find the number halfway between 70 and 345, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 345 into our formula, we get:
(70 + 345)/2 = 207.5
Thus, the number halfway between 70 and 345 is 207.5.
To check that our answer is correct, we subtract 70 from 207.5 and subtract 207.5 from 345 and compare the two numbers:
207.5 - 70 = 137.5
345 - 207.5 = 137.5
As you can see, the halfway number is 137.5 higher than 70 and 137.5 lower than 345. Therefore, our halfway between answer of 207.5 above is correct.
Halfway Between
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Halfway Between 70 and 346
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