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toán cộng có nhớ
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72 + 9
81
Oops!
Okay!
76 + 6 =
82
Oops!
Okay!
14 + 8.........15 + 9
<
Oops!
Okay!
35 + 6..........37 + 4
=
Oops!
Okay!
Hùng có 28 viên bi. Lâm có nhiều hơn Hùng 7 viên bi. Hỏi Lâm có bao nhiêu viên bi?
35 viên bi
Oops!
Okay!
28 + 4 =
32
Oops!
Okay!
23 + 8
31
Oops!
Okay!
79 + 9 =
88
Oops!
Okay!
45 + 5
50
Oops!
Okay!
57 + 8
65
Oops!
Okay!
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