1.8081.88 0.45×1045÷100
7.827.82×0.6 0.614×1.261.4×0.12
4×0.5= 3.2÷0.8= 4.2÷0.7= 2.02÷2=
1.5×6= 0.7×0.9= 2.5×40= 3.6÷0.06=
7b+0.8b-6.5b=