7.9×0.87.9 2.1÷1.022.1
0.89÷0.980.89 4.25×1.14.25
1.666 4÷50.8
1.5÷0.3= 36÷0.4= 29.29÷29= 3÷15=
4÷0.25= 0÷19.8= 0.2×0.05= 0.6×1.5=