When you ask "What number is halfway between 55 and 691?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=55 and Y=691.
To find the number halfway between 55 and 691, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 691 into our formula, we get:
(55 + 691)/2 = 373
Thus, the number halfway between 55 and 691 is 373.
To check that our answer is correct, we subtract 55 from 373 and subtract 373 from 691 and compare the two numbers:
373 - 55 = 318
691 - 373 = 318
As you can see, the halfway number is 318 higher than 55 and 318 lower than 691. Therefore, our halfway between answer of 373 above is correct.
Halfway Between
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Halfway Between 55 and 692
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