80+5=
76-6=
64-60=
6+70=
49-9=
83-3=
95-90=
9+9=
20颗
40颗
16颗
9+6= 13-6= 8+8= 85-80= 70+7=
44-40= 19-4= 14-7=
14-5+8= 15-8+9= 17-7+5= 11-4+8=
3+8= 10+4= 14-9= 13-8= 80-20+25=
28+60= 86-5= 17-7= 60-10= 6+53-20=
88-77= 68-50= 26+3= 50+8= 34-30+30=
48-6= 10+45= 47+3= 40-( )=20 30+( )=60
70-40= 12-8= 23+5= 13+7+54=
32-7= 39-6= 70+7= 40+(13-6)=
6+6= 34-30= 6+50= 75-(10+50)=
58+7= 6+55= 36+20=
55+10= 49+6= 4+56=
故障轮船 商船
军舰 货船