When you ask "What number is halfway between 70 and 170?" 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=170.
To find the number halfway between 70 and 170, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 170 into our formula, we get:
(70 + 170)/2 = 120
Thus, the number halfway between 70 and 170 is 120.
To check that our answer is correct, we subtract 70 from 120 and subtract 120 from 170 and compare the two numbers:
120 - 70 = 50
170 - 120 = 50
As you can see, the halfway number is 50 higher than 70 and 50 lower than 170. Therefore, our halfway between answer of 120 above is correct.
Halfway Between
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Halfway Between 70 and 171
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