51÷10.2= 51÷102= 0.5×10.2=
590.5=118 541.2=64.8 590.5=59.5
3.5×0.2= 6×1.5= 1.25×0.8= 1.25×3.3×0=
0.99÷0.1= 6.4÷0.8= 10÷0.5= 0.63÷0.9×10=
①0.25×9.87×4
②5.81×5.6+2.19×5.6
③0.94×2.5-0.45
④1.73×10.2
⑤12.56÷5÷0.4
⑥32×12.5×2.5
11÷13 = (用循环小数简便记法)