When you ask "What number is halfway between 88 and 861?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=861.
To find the number halfway between 88 and 861, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 861 into our formula, we get:
(88 + 861)/2 = 474.5
Thus, the number halfway between 88 and 861 is 474.5.
To check that our answer is correct, we subtract 88 from 474.5 and subtract 474.5 from 861 and compare the two numbers:
474.5 - 88 = 386.5
861 - 474.5 = 386.5
As you can see, the halfway number is 386.5 higher than 88 and 386.5 lower than 861. Therefore, our halfway between answer of 474.5 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 88 and 862
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