Addition
400+600
1000
200-120
80
15.5x5
77.5
-120/4
-30
-35+15
-20
650+570
1220
900-450
450
-25x10
-250
-200/-10
20
-175+300
125
12.75+5.20
17.95
15.50-12
3.50
-60x-70
1400/70
20
(-600)+500
-100
30.50+22.50
53
20-50
-30
30x100
3000
147/9
16.33
15x30
450
56.25+67.50
123.75
100-235
-135
-25x40
-1000
289/17
17
757/36
21.03