When you ask "What number is halfway between 17 and 550?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=17 and Y=550.
To find the number halfway between 17 and 550, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 550 into our formula, we get:
(17 + 550)/2 = 283.5
Thus, the number halfway between 17 and 550 is 283.5.
To check that our answer is correct, we subtract 17 from 283.5 and subtract 283.5 from 550 and compare the two numbers:
283.5 - 17 = 266.5
550 - 283.5 = 266.5
As you can see, the halfway number is 266.5 higher than 17 and 266.5 lower than 550. Therefore, our halfway between answer of 283.5 above is correct.
Halfway Between
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Halfway Between 17 and 551
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