0.9-0.09= + = 7÷0.05 = 9.6+4=
1- = 0.72÷0.6 = 10.2×0.5 = 45×4÷45×4=
0.36+1.4= 1.5÷0.01= 5.2÷0.4= 1.25×3.8×0.8=
4÷3= 4.3a-a+0.7a= 1.5×0.4= 6.9-3.2-2.8=