When you ask "What number is halfway between 69 and 987?" 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=987.
To find the number halfway between 69 and 987, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 987 into our formula, we get:
(69 + 987)/2 = 528
Thus, the number halfway between 69 and 987 is 528.
To check that our answer is correct, we subtract 69 from 528 and subtract 528 from 987 and compare the two numbers:
528 - 69 = 459
987 - 528 = 459
As you can see, the halfway number is 459 higher than 69 and 459 lower than 987. Therefore, our halfway between answer of 528 above is correct.
Halfway Between
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Halfway Between 69 and 988
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