When you ask "What number is halfway between 3 and 140?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=140.
To find the number halfway between 3 and 140, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 140 into our formula, we get:
(3 + 140)/2 = 71.5
Thus, the number halfway between 3 and 140 is 71.5.
To check that our answer is correct, we subtract 3 from 71.5 and subtract 71.5 from 140 and compare the two numbers:
71.5 - 3 = 68.5
140 - 71.5 = 68.5
As you can see, the halfway number is 68.5 higher than 3 and 68.5 lower than 140. Therefore, our halfway between answer of 71.5 above is correct.
Halfway Between
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Halfway Between 3 and 141
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