When you ask "What number is halfway between 4 and 438?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=4 and Y=438.
To find the number halfway between 4 and 438, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 438 into our formula, we get:
(4 + 438)/2 = 221
Thus, the number halfway between 4 and 438 is 221.
To check that our answer is correct, we subtract 4 from 221 and subtract 221 from 438 and compare the two numbers:
221 - 4 = 217
438 - 221 = 217
As you can see, the halfway number is 217 higher than 4 and 217 lower than 438. Therefore, our halfway between answer of 221 above is correct.
Halfway Between
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Halfway Between 4 and 439
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