When you ask "What number is halfway between 3 and 402?" 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=402.
To find the number halfway between 3 and 402, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 402 into our formula, we get:
(3 + 402)/2 = 202.5
Thus, the number halfway between 3 and 402 is 202.5.
To check that our answer is correct, we subtract 3 from 202.5 and subtract 202.5 from 402 and compare the two numbers:
202.5 - 3 = 199.5
402 - 202.5 = 199.5
As you can see, the halfway number is 199.5 higher than 3 and 199.5 lower than 402. Therefore, our halfway between answer of 202.5 above is correct.
Halfway Between
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Halfway Between 3 and 403
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