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Bài 2 tr.80 Luyện tập chung
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20 : 2 = ?
10
Oops!
Okay!
60 : 2 = ?
30
Oops!
Okay!
80 : 4 = ?
20
Oops!
Okay!
500 : 5 = ?
100
Oops!
Okay!
900 : 3 = ?
300
Oops!
Okay!
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