0.82×1.31.3 100÷0.8100 7.2÷127.2×12
3.5÷0.1= 0×1.6= 7.2÷7.2= 0.2÷4×0.2×4=
0.4×1.5= 6.3-4.9= 0.52÷13 = 4.8+62×0.1=