adding
9+9
18
60-30
30
80/10
8
5x10
50
round this number to the nearest ten 567
570
60+30
90
108-56
52
110/10
11
12x10
120
round to the nearest hundred 670
700
40+40
80
678-567
111
100/10
10
10x10
100
round this number to the nearest thousand 1346
1000
100+200
300
560-324
236
120/10
12
10x1
10
round this number to the nearest hundred 789
800
556+567
1123
1768-901
867
72/9
8
90x56
5040
round this to the nearest hundred 956
1000