What is1,0.6,0.8,0.87,0.2,0.24 each rounded to nearest hundreds

Rounding is really simple and easy to learn. Let us do it with numbers you provided.

Rounding to hundredth would be where the three is 1.23.

Rounding:
1→1  There is no hundredth place value (There is a value but it's a zero so we do nothing)

0.6→ 0.6 There is no hundredth place value

0.8→0.8 There is no hundredth place value

0.87→ 0.9 The rounding rules state that if the previous number is greater than four, you the number up else it rounds down

0.2→ 0.2 There is no hundredth place value

0.24→ 0.2 The rounding rules state that if the previous number is greater than four, you the number up else it rounds down

Its different because when u add 645 and 738 it equals 1,382 and when u add  645 and 649 it equals 1,294 so 1,382 is the greater number and its different from 1,294