When you ask "What number is halfway between 70 and 189?" 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=189.
To find the number halfway between 70 and 189, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 189 into our formula, we get:
(70 + 189)/2 = 129.5
Thus, the number halfway between 70 and 189 is 129.5.
To check that our answer is correct, we subtract 70 from 129.5 and subtract 129.5 from 189 and compare the two numbers:
129.5 - 70 = 59.5
189 - 129.5 = 59.5
As you can see, the halfway number is 59.5 higher than 70 and 59.5 lower than 189. Therefore, our halfway between answer of 129.5 above is correct.
Halfway Between
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Halfway Between 70 and 190
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