Số?
9 + 3 = ..... 2 + 9 = .....
9 + 8 = ..... 6 + 9 = .....
9 + 7 = ..... 7 + 9 = .....
9 + 6 = ..... 9 + 2 = .....
9 + 5 = ..... 9 + 9 = .....
9 + 4 = ..... 9 + 1 = .....
9 + 3 = 12 2 + 9 = 11
9 + 8 = 17 6 + 9 = 15
9 + 7 = 16 7 + 9 = 16
9 + 6 = 15 9 + 2 = 11
9 + 5 = 14 9 + 9 = 18
9 + 4 = 13 9 + 1 = 10
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