74-7=(70+4)-7=70+(4-7)=70-3=6752-8=(50+2)-8=50+(2-8)=50-6=4485-6=(80+5)-6=80+(5-6)=80-1=7985-9=(80+5)-9=80+(5-9)=80-4=7652-9=(50+2)-9=50+(2-9)=50-7=4374-6=(70+4)-6=70+(4-6)=70-2=6885-7=(80+5)-7=80+(5-7)=80-2=7885-8=(80+5)-8=80+(5-8)=80-3=77
74-7=(70+4)-7=70+(4-7)=70-3=67
52-8=(50+2)-8=50+(2-8)=50-6=44
85-6=(80+5)-6=80+(5-6)=80-1=79
85-9=(80+5)-9=80+(5-9)=80-4=76
52-9=(50+2)-9=50+(2-9)=50-7=43
74-6=(70+4)-6=70+(4-6)=70-2=68
85-7=(80+5)-7=80+(5-7)=80-2=78
85-8=(80+5)-8=80+(5-8)=80-3=77