When you ask "What number is halfway between 4 and 149?" 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=149.
To find the number halfway between 4 and 149, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 149 into our formula, we get:
(4 + 149)/2 = 76.5
Thus, the number halfway between 4 and 149 is 76.5.
To check that our answer is correct, we subtract 4 from 76.5 and subtract 76.5 from 149 and compare the two numbers:
76.5 - 4 = 72.5
149 - 76.5 = 72.5
As you can see, the halfway number is 72.5 higher than 4 and 72.5 lower than 149. Therefore, our halfway between answer of 76.5 above is correct.
Halfway Between
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Halfway Between 4 and 150
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