5.6÷0.5= 4.9×0.2= 0.81÷0.09= 1÷0.25=
8÷0.2= 3.4-0.34= 14÷5= 7.8÷0.01=
13.3+6.7= 12= = 49×101≈
21×50= 12.5×8= 0.72÷0.8= =