15-6= 13-5= 54-4= 11-7+6=
17-8= 11-6= 70-10= 14-9-2=
14-6= 75+4= 30+24= 20+30+40=
12-5= 18-9= 37+2= 40+60-70=
4+68 40+884 75-570
13-48 6+30◯36 89-990
12-5=
11-8=
7+5=
6+7=
13-4=
16-9=
15-7=
17-8=
5+8=
6+8=
8+8=
14-6=
(个)
5995 1角9分 34+4781
10099 4元3元8角 92-6330
能穿串。
+ = 50÷50%= = 3 -1.125=
1.9÷2.5÷0.4= ( )×18= = 1- =