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找规律,填一填 1,3,9,27,81,,,,.1,2,6,24,,,.3,15,75,,,

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找规律,填一填 1,3,9,27,81,,,,.1,2,6,24,,,.3,15,75,,,
找规律,填一填 1,3,9,27,81,,,,.1,2,6,24,,,.3,15,75,,,
① 1 x 3 =3
3 x3 =9
9 x 3 =27
27 x3=……
② 1 x 2 = 2
2 x 3 = 6
6 x 4 = 24
24 x 5 =……
③ 3 x 5 = 15
15 x 5 = 75
75 x 5 = ……