When you ask "What number is halfway between 55 and 149?" 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=149.
To find the number halfway between 55 and 149, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 149 into our formula, we get:
(55 + 149)/2 = 102
Thus, the number halfway between 55 and 149 is 102.
To check that our answer is correct, we subtract 55 from 102 and subtract 102 from 149 and compare the two numbers:
102 - 55 = 47
149 - 102 = 47
As you can see, the halfway number is 47 higher than 55 and 47 lower than 149. Therefore, our halfway between answer of 102 above is correct.
Halfway Between
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Halfway Between 55 and 150
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