2.16×0.4=8.64
0.9×5.21=4.689
7.9×7.9=6.241
43×6.7=28.81
4÷250.2 10.5÷0. 3 10.5 4.2÷0.3÷0.2 4.2÷0.06
1.333…
27.736736…
1.011212…
x÷8=4.2 57﹣x=39 2x+3x=7.5
7.2×0.2= 10-5.66= 0.4×2.5= 0.45÷0.5÷9=
1÷0.125= 4.7÷0.1= 120×0.5= 3.2÷0.8×0.5=
99
97
40
50