如图，小明用小棒搭房子，他搭3间房子用13根小棒．照这样，搭10间房子要用_1根小棒；搭n间房子要用_2根小棒（用含有n的式子表示）．_刷题宝

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如图，小明用小棒搭房子，他搭3间房子用13根小棒．照这样，搭10间房子要用____根小棒；搭n间房子要用____根小棒（用含有n的式子表示）．

上一题下一题 0.0难度选择题更新时间:2018-12-23 06:50:27

答案(点此获取答案解析）

41,1+4n

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