2.9494…≈ ≈ 0.999…≈ 12.333…≈
0.6×0.9=
2.5×4×12=
0.72÷0.9=
50×0.02=
7.9+0.1=
0.7÷0.01=
12.5×8=
6-0.6=
2.65÷3.4≈(得数保留三位小数)
★2.35×1.2=
①7.2÷2.5 ÷2
②(2.4÷6.8)÷4
③1.2÷0.6-0.4×0.5
④27×1.5÷0.9