1) 800-320=480
480/80=6
6*20=120
120-45=75
2) 420/60=7
7*20=140
140+15=155
155-60=95
3) 8*50=400
400-120=280
280/4=70
70+35=105
4) 380+290=670
670-110=560
560/80=7
7*60=420
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1) 800-320=480
480/80=6
6*20=120
120-45=75
2) 420/60=7
7*20=140
140+15=155
155-60=95
3) 8*50=400
400-120=280
280/4=70
70+35=105
4) 380+290=670
670-110=560
560/80=7
7*60=420