.846.7×5 2.796.64×25
3.69.47÷0.5 4.34.128÷0.25
5.0.99÷4.5 6.4.8÷2.5
7.12.5×0.25×0.05×3.7×6.4
8.12.728÷2.5÷32÷0.125
9.0.04×0.5×1.25×0.8×0.2×0.025
10.9.87÷28.6×4.59÷98.7×2.86÷45.9
11.5.6×16.5÷0.7÷1.1
12.（6.4×12.5×0.5）÷（2.5×1.6×0.2）
13.0.525×17.36÷13.125÷4
14.3700÷6.4÷2.5÷12.5÷0.5 4X7
下面这个网址里很多,存一下试试