When you ask "What number is halfway between 4 and 145?" 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=145.
To find the number halfway between 4 and 145, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 145 into our formula, we get:
(4 + 145)/2 = 74.5
Thus, the number halfway between 4 and 145 is 74.5.
To check that our answer is correct, we subtract 4 from 74.5 and subtract 74.5 from 145 and compare the two numbers:
74.5 - 4 = 70.5
145 - 74.5 = 70.5
As you can see, the halfway number is 70.5 higher than 4 and 70.5 lower than 145. Therefore, our halfway between answer of 74.5 above is correct.
Halfway Between
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Halfway Between 4 and 146
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