1.3×4 3.63﹣1.13 0.54÷9 2x+5x 9.2+1.8
1.2×0.4 22.4÷0.2 3.7×200 72+6.28 1.2÷1.2
2.05×6 1.84﹣0.8 13y﹣5y 12÷0.06 4.5×0.02
9.6÷3 6÷0.5 0.13×40 1.9÷0.1 1.23×300
1.02﹣1 2.019÷1 1.999×0 7.2+8 0.5×0.4
25.2÷4 2.5a+1.5a 1.25×0.8 b﹣0.2b 1÷0.02
