Show:
Round to nearest 10
Round to the nearest 100
Round to the nearest 1000
Addition and rounding
Subtraction and rounding
100
53
50
100
678
700
100
1675
2000
100
Add then round to the nearest 10 56 + 34=
90
100
Subtract then round the difference to the nearest 10. 38 - 5 =
33 rounds to 30
200
88
90
200
894
900
200
4342
4000
200
Add the round to the nearest 10 39 + 21=
60
200
Subtract then round the difference to the nearest 10. 167 - 25 =
142 rounds to 140
300
11
10
300
204
200
300
7569
8000
300
Add then round to the nearest 100 835 + 27=
862 rounds to 900
300
Subtract then round the difference to the nearest 10. 178 - 69=
109 rounds to 110
400
320
320
400
910
900
400
2745
3000
400
Add and round the sum to the nearest 100. 278 + 384 =
662 rounds to 700
400
Subtract then round the difference to the nearest 100. 582 - 195 =
387 rounds to 400
500
746
750
500
433
400
500
1326
1000
500
Add the round the sum to the nearest 100. 313 + 213=
526 rounds to 500
500
Subtract then round the difference to the nearest 100. 721- 489=
232 rounds to 200