问题 填空题
3
5
=______÷20=
15
()
=______(填小数)
答案

3
5
=
3×4
5×4
=
12
20
=12÷20,

3
5
=
3×5
5×5
=
15
25

3
5
=3÷5=0.6,

故答案为:12,25,0.6.

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