5 + 7 = - 12, 7 + 4 =  - 11, 6 + 8 = - 14, ( ) + 0 = 10 - 10, 8 + 5 = - 13, 8 + 9 = - 17, 1 + ? = 10  - 9, 7 + 8 = - 15, 13 + 3 = - 16, 11 + 8 = - 19,

20以内的加法 (Tambah Dalam Lingkungan 20)

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