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(1)0.12÷0.3=
1.2
1.2
÷3
(2)2.8÷0.07=
280
280
÷7
(3)0.045÷0.9=
0.45
0.45
÷9
(4)0.36÷0.4=
3.6
3.6
÷4
(5)0.81÷0.27=
81
81
÷27
(6)2.2÷0.11=
220
220
÷11
(7) (8)
分析:在除法算式中被除数和除数同时扩大或缩小相同的倍数(0除外),商不变;据此解答即可.
解答:
解:(1)0.12÷0.3=1.2÷3 (2)2.8÷0.07=280÷7
(3)0.045÷0.9=0.45÷9 (4)0.36÷0.4=3.6÷4
(5)0.81÷0.27=81÷27 (6)2.2÷0.11=220÷11

点评:此题考查了商不变性质的灵活运用.
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