问题 填空题
______÷20=4:______=0.2=
()
50
=______%
答案

0.2=2÷10=

1
5

1
5
=
1×4
5×4
=
4
20
=4:20,

1
5
=
1×10
5×10
=
10
50

0.2=0.2×100%=20%.

故答案为:4,20,10,20.

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