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vuvip198
2 năm trước
Bài1: Tổng số tuổi của hai mẹ con bằng 49 tuổi . Tính tuổi của mỗi người biết rằng tuổi con bằng 2/5 tuổi mẹ. Bài2: 2+3/100+5/1000 Bài3 21:5,6 Bài4 93km 5m= km 8.08kg= g 600m vuông = m vuông 4/5 km= m 12.5 cm vuông = m vuông 5 m vuông 7 cm vuông = m vuông
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