□○□=□(下)
16-7=
15-8=
11-2=
12-8=
13-4=
11-8=
15-6=
11-5=
15-7=
14-6=
17-8=
13-6=
12-4=
15-9=
11-3=
12-5=
1.5÷0.05= 8÷0.001= 2.2+8= 31.9-3.09= 3×4÷3×4=
× = 5- + = × = 0.12= 1÷ - ÷1=