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教室墙面刮瓷，甲队单独干 10 天完成，乙队单独干 15 天完成。 两队合干几天可以完成？

教室墙面刮瓷，甲队单独干 10 天完成，乙队单独干 15 天完成。 两队合干几天可以完成？. 1 、学校要铺地板砖，甲组单独铺要 6 天完成，乙组单独铺要 9 天完成， 两组合作，几天可以完成任务？. 2 、一批涂料，单独用来刷课桌 可以刷 200 张，单独用来刷椅 子可以刷 300 张。这批涂料可 以刷多少套课桌椅？.

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教室墙面刮瓷，甲队单独干 10 天完成，乙队单独干 15 天完成。 两队合干几天可以完成？

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  1. 教室墙面刮瓷，甲队单独干10 天完成，乙队单独干15天完成。 两队合干几天可以完成？

  2. 1、学校要铺地板砖，甲组单独铺要 6天完成，乙组单独铺要9天完成， 两组合作，几天可以完成任务？

  3. 2、一批涂料，单独用来刷课桌 可以刷200张，单独用来刷椅 子可以刷300张。这批涂料可 以刷多少套课桌椅？

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