When rounding off numbers, the rule is : If the first figure to be discarded is 5 or more then the previous figure is increased by 1.
The first figure to be discarded is 7 therefore the previous number (2) is increased by 1 (to 3).
2786 to the nearest 1000 is 3000.
2786 rounded to the nearest 10 is 2790.
2790
2786.000
5572/1000 2786/500 1393/250
2800
All numbers can be written in roman numerals. 2786 is written as MMDCCLXXXVI.
1000
1000
1000
1000
1000
1000