When you ask "What number is halfway between 20 and 147?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=147.
To find the number halfway between 20 and 147, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 147 into our formula, we get:
(20 + 147)/2 = 83.5
Thus, the number halfway between 20 and 147 is 83.5.
To check that our answer is correct, we subtract 20 from 83.5 and subtract 83.5 from 147 and compare the two numbers:
83.5 - 20 = 63.5
147 - 83.5 = 63.5
As you can see, the halfway number is 63.5 higher than 20 and 63.5 lower than 147. Therefore, our halfway between answer of 83.5 above is correct.
Halfway Between
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Halfway Between 20 and 148
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