3.98÷0.123.98 45.2×0.9845.2 1.9÷0.11.9
4.05÷0.854.05 3.24÷1.13.24
0.37÷0.60.37×0.6 7.8×0.17.8÷10
3.7+3=3.7×3 0.9÷1.50.9×1.5
9.99÷0.01999×0.01 0.21×0.210.21÷0.21