When you ask "What number is halfway between 84 and 429?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=429.
To find the number halfway between 84 and 429, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 429 into our formula, we get:
(84 + 429)/2 = 256.5
Thus, the number halfway between 84 and 429 is 256.5.
To check that our answer is correct, we subtract 84 from 256.5 and subtract 256.5 from 429 and compare the two numbers:
256.5 - 84 = 172.5
429 - 256.5 = 172.5
As you can see, the halfway number is 172.5 higher than 84 and 172.5 lower than 429. Therefore, our halfway between answer of 256.5 above is correct.
Halfway Between
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Halfway Between 84 and 430
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