When you ask "What number is halfway between 10 and 845?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=10 and Y=845.
To find the number halfway between 10 and 845, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 845 into our formula, we get:
(10 + 845)/2 = 427.5
Thus, the number halfway between 10 and 845 is 427.5.
To check that our answer is correct, we subtract 10 from 427.5 and subtract 427.5 from 845 and compare the two numbers:
427.5 - 10 = 417.5
845 - 427.5 = 417.5
As you can see, the halfway number is 417.5 higher than 10 and 417.5 lower than 845. Therefore, our halfway between answer of 427.5 above is correct.
Halfway Between
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Halfway Between 10 and 846
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