题目内容

0.45÷0.09=
45
45
÷
9
9
=
5
5
．
分析：商不变性质为：被除数和除数同时扩大或缩小相同的倍数（零除外），商不变；据此解答即可．
解答：解：0.45÷0.09
=（0.45×100）÷（0.09×100）
=45÷9
=5
故答案为：45，9，5．
点评：此题考查商不变的性质的运用．
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1
3
+
1
3
=
5
8
-
1
8
=
7.2÷0.3=
5
4
-1=
4
5
+0.2=
0.54÷9=
8
9
-
1
9
=
1
2
-
1
3
=
3
5
-
3
5
=
1
6
+
2
5
=
1÷0.25=
11
14
+
9
14
=
0.67+0.3=
0.38×2=
8.1÷0.09=
2-
1
3
=
12×0.5=
2.5×0.6=
0.89×0.48+0.89×0.52 0.25×13.7×0.4 4.2×101
3.6×99 2.5×32×1.25 0.125×88
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17.8÷（1.78×4）
直接写得数
143+298=		 1-0.09=
4
5
×4=		 45.15÷15=
2
5
-
4
15
=		 1÷60%= 0.22+2=
1
3
+
2
3
÷2=
5÷9×
5
9
=		 5.38-（1.8+2.38）=

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