问题 填空题
0.45=
()
20
=______%=27÷______=______:______.
答案

0.45=

9
20

0.45=45%,

0.45=

45÷5×3
100÷5×3
=
27
60
=27÷60,

0.45=

9
20
=9:20,

故答案为:9,45,60,9,20.

单项选择题
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