When you ask "What number is halfway between 10 and 553?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=10 and Y=553.
To find the number halfway between 10 and 553, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 553 into our formula, we get:
(10 + 553)/2 = 281.5
Thus, the number halfway between 10 and 553 is 281.5.
To check that our answer is correct, we subtract 10 from 281.5 and subtract 281.5 from 553 and compare the two numbers:
281.5 - 10 = 271.5
553 - 281.5 = 271.5
As you can see, the halfway number is 271.5 higher than 10 and 271.5 lower than 553. Therefore, our halfway between answer of 281.5 above is correct.
Halfway Between
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Halfway Between 10 and 554
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