9 + 2 = .. - 11, 10 - 5 = .. - 5, 2 + 4 = .. - 6, 4 - 1 = .. - 3, 2 + 6 = .. - 8, 3 + 6 = .. - 9, 4 + 6 = .. - 10, 1 + 1 = .. - 2, 5 + 2 = .. - 7, 4 - 3 = .. - 1,

soal Matematika pertambahan dan pengurangan

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