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在長37.1公尺的長廊牆壁上要懸掛15幅畫,每張畫寬1.3公尺,壁與畫、畫與畫間的間隔都要相等,間隔是多少公尺?
妹妹有一本童話書,第一天看10頁、第二天看12頁、第三天看5頁、第四天看8頁、第五天看了最後的10頁。平均一天看幾頁?
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