82
And the following numbers would be...
That depends on what you are rounding to. 8.6 rounded to the nearest tenth (or less) is 8.6; to the nearest integer is 9; to the nearest multiple of 10 is 10; to the nearest multiple of 100 (or more) is 0.
All numbers between 299.5 and 300.5, including 299.5 but excluding 300.5, round to 300 ( to the nearest integer; there are more numbers that fill the bill if you are rounding to the nearest multiple of 10 or 100).
The numbers 294 rounded off to the nearest 10 is 300.
The idea is to round each of the numbers - in this case to the nearest multiple of 10 - then do the addition in your head.
10. 245,246,247,248,249,250,251,252,253,254.
10
Half of 10 is 5.So numbers in the range 800 ± 5 round to 800 to the nearest 10, except that numbers exactly half way round up. Thus all numbers greater than or equal to 800 - 5 round up to 800 and all numbers less than 800 + 5 round down to 800,That is all numbers greater than or equal to 795 and less than 805 will round to 800 to the nearest 10.
10 of them.
Anything from 115 to 124.
252, 262, 272, 282, 292
because 199 rounded to the nearest 10 is 200, so 199 to the nearest 100 is 200.. Because 200 is both a multiple of 10 and 100.