2.5÷1.12.5 5.3
①0.25×8=
②31.6×0.1=
③4.99×2≈
④9×5.1≈
⑤2.4÷2=
⑥48÷0.6=
⑦0.056÷0.8=
⑧0.45÷0.3=
3.141×0.993.141 4.39×104.39÷0.1
4.6×0.32= 91.2÷7.6= 78.6÷11=(商用循环小数表示)