When you ask "What number is halfway between 70 and 278?" 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=278.
To find the number halfway between 70 and 278, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 278 into our formula, we get:
(70 + 278)/2 = 174
Thus, the number halfway between 70 and 278 is 174.
To check that our answer is correct, we subtract 70 from 174 and subtract 174 from 278 and compare the two numbers:
174 - 70 = 104
278 - 174 = 104
As you can see, the halfway number is 104 higher than 70 and 104 lower than 278. Therefore, our halfway between answer of 174 above is correct.
Halfway Between
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Halfway Between 70 and 279
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