
When you ask "What number is halfway between 67 and 689?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=67 and Y=689.

To find the number halfway between 67 and 689, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 67 and 689 into our formula, we get:
(67 + 689)/2 = 378
Thus, the number halfway between 67 and 689 is 378.
To check that our answer is correct, we subtract 67 from 378 and subtract 378 from 689 and compare the two numbers:
378 - 67 = 311
689 - 378 = 311
As you can see, the halfway number is 311 higher than 67 and 311 lower than 689. Therefore, our halfway between answer of 378 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 67 and 690
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