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五年级数学下册6分数的加法和减法分数加减混合运算补充习题1新人教版.doc

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1分数的加法和减法分数加减混合运算同学们采集树种，第一组采集了 54千克，第二组比第一组少收集了 41千克，第三组比第二组多收集了 31千克。第三组收集了多少千克？答：第三组收集了 千克。答案提示： 54 1 3 608 2答：第三组收集了 53千克。2

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