When you ask "What number is halfway between 5 and 154?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=5 and Y=154.
To find the number halfway between 5 and 154, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 5 and 154 into our formula, we get:
(5 + 154)/2 = 79.5
Thus, the number halfway between 5 and 154 is 79.5.
To check that our answer is correct, we subtract 5 from 79.5 and subtract 79.5 from 154 and compare the two numbers:
79.5 - 5 = 74.5
154 - 79.5 = 74.5
As you can see, the halfway number is 74.5 higher than 5 and 74.5 lower than 154. Therefore, our halfway between answer of 79.5 above is correct.
Halfway Between
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Halfway Between 5 and 155
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