When you ask "What number is halfway between 66 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=66 and Y=170.
To find the number halfway between 66 and 170, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 66 and 170 into our formula, we get:
(66 + 170)/2 = 118
Thus, the number halfway between 66 and 170 is 118.
To check that our answer is correct, we subtract 66 from 118 and subtract 118 from 170 and compare the two numbers:
118 - 66 = 52
170 - 118 = 52
As you can see, the halfway number is 52 higher than 66 and 52 lower than 170. Therefore, our halfway between answer of 118 above is correct.
Halfway Between
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Halfway Between 66 and 171
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