When you ask "What number is halfway between 3 and 489?" 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=489.
To find the number halfway between 3 and 489, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 489 into our formula, we get:
(3 + 489)/2 = 246
Thus, the number halfway between 3 and 489 is 246.
To check that our answer is correct, we subtract 3 from 246 and subtract 246 from 489 and compare the two numbers:
246 - 3 = 243
489 - 246 = 243
As you can see, the halfway number is 243 higher than 3 and 243 lower than 489. Therefore, our halfway between answer of 246 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 3 and 490
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