46+8=□
6380-8 68-2078-40 14分1元4角
46+2059 52-852+20 1元2角5角
12-9=
13-9=
14-9=
15-8=
12-8=
13-8=
14-8=
15-7=
12-7=
13-7=
11-7=
10-6=
12-6=
13-6=
11-6=
(个)
345﹣298= 0.64÷0.8= ﹣ = × =
1÷0.05= 0.25×40= 2÷ = ×25%=