1个正方形用4根小棒摆成,2个正方形用7根小棒摆成,3个正方形用10根小棒摆成,4个正方形用13根小棒摆成,
1个正方形用4根小棒摆成,2个正方形用7根小棒摆成,3个正方形用10根小棒摆成,4个正方形用13根小棒摆成,15个正方形用______根小棒摆成,31根小棒能摆_____...
1个正方形用4根小棒摆成,2个正方形用7根小棒摆成,3个正方形用10根小棒摆成,4个正方形用13根小棒摆成,15个正方形用______根小棒摆成,31根小棒能摆______个正方形.
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