When you ask "What number is halfway between 4 and 143?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=4 and Y=143.
To find the number halfway between 4 and 143, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 143 into our formula, we get:
(4 + 143)/2 = 73.5
Thus, the number halfway between 4 and 143 is 73.5.
To check that our answer is correct, we subtract 4 from 73.5 and subtract 73.5 from 143 and compare the two numbers:
73.5 - 4 = 69.5
143 - 73.5 = 69.5
As you can see, the halfway number is 69.5 higher than 4 and 69.5 lower than 143. Therefore, our halfway between answer of 73.5 above is correct.
Halfway Between
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Halfway Between 4 and 144
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