When you ask "What number is halfway between 19 and 1000?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=19 and Y=1000.
To find the number halfway between 19 and 1000, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 19 and 1000 into our formula, we get:
(19 + 1000)/2 = 509.5
Thus, the number halfway between 19 and 1000 is 509.5.
To check that our answer is correct, we subtract 19 from 509.5 and subtract 509.5 from 1000 and compare the two numbers:
509.5 - 19 = 490.5
1000 - 509.5 = 490.5
As you can see, the halfway number is 490.5 higher than 19 and 490.5 lower than 1000. Therefore, our halfway between answer of 509.5 above is correct.
Halfway Between
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