When you ask "What number is halfway between 69 and 150?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=69 and Y=150.
To find the number halfway between 69 and 150, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 150 into our formula, we get:
(69 + 150)/2 = 109.5
Thus, the number halfway between 69 and 150 is 109.5.
To check that our answer is correct, we subtract 69 from 109.5 and subtract 109.5 from 150 and compare the two numbers:
109.5 - 69 = 40.5
150 - 109.5 = 40.5
As you can see, the halfway number is 40.5 higher than 69 and 40.5 lower than 150. Therefore, our halfway between answer of 109.5 above is correct.
Halfway Between
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Halfway Between 69 and 151
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