When you ask "What number is halfway between 2 and 138?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=2 and Y=138.
To find the number halfway between 2 and 138, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 2 and 138 into our formula, we get:
(2 + 138)/2 = 70
Thus, the number halfway between 2 and 138 is 70.
To check that our answer is correct, we subtract 2 from 70 and subtract 70 from 138 and compare the two numbers:
70 - 2 = 68
138 - 70 = 68
As you can see, the halfway number is 68 higher than 2 and 68 lower than 138. Therefore, our halfway between answer of 70 above is correct.
Halfway Between
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Halfway Between 2 and 139
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