5.4m2=dm2 40cm2=dm2
4.05÷0.854.05 3.24÷1.13.24
0.37÷0.60.37×0.6 7.8×0.17.8÷10
0.8÷4= 6÷5= 0.25÷0.5= 8.1÷9=
2.4÷0.6= 0.12÷3= 40÷80= 5÷100=
24.8÷8= 0.72÷0.09= 64÷0.8= 4.9÷70=