When you ask "What number is halfway between 3 and 155?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=155.
To find the number halfway between 3 and 155, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 155 into our formula, we get:
(3 + 155)/2 = 79
Thus, the number halfway between 3 and 155 is 79.
To check that our answer is correct, we subtract 3 from 79 and subtract 79 from 155 and compare the two numbers:
79 - 3 = 76
155 - 79 = 76
As you can see, the halfway number is 76 higher than 3 and 76 lower than 155. Therefore, our halfway between answer of 79 above is correct.
Halfway Between
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Halfway Between 3 and 156
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