①1.5x﹣x=3.6
②1.2×5+0.7x=20.7
21.4×36=
2.15×4.4=
8.46×7=
43.4÷31=
29.7÷11=
7.53×0.9=
7.3×1.27.3 4.9×0.654.9
0.45÷0.990.45 2.85÷0.62.85×0.6