3.4×6.6+3.4×3.4 12.83-(7.9+2.83)
9.4÷[(1.3+1.4)÷0.27] 3.7+6.3÷0.21×1.1
8.1÷0.9=
0.65÷1.3=
0.45÷3=
0.36×3=
21.9÷7.3=
0.32÷1.6=
8÷5=
8.5÷2=
0.3×0.2= 0.7×0.3= 0.02×0.2= 0.8×0.5=
0.78÷0.01= 4.8÷0.06= 4÷0.25= 3.2÷0.05=
25.4-40.5÷7.5
3.2+0.8÷4
(12-7.2)÷(0.84÷2.1)
1.25×4.7×0.8
32.8×0.2+0.8
0.63×102
2.32×6.5+7.68×6.5
6.8×7.8÷3.9
7.2÷2.5÷4
8平方千米80公顷 5公顷50000平方米
3.66÷1.023.66
143×7=1001
143×14=2002
143×21=3003
143×28=
……
143×=8008