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Toán Lớp 5: a) x + 657 = 1657 b) 4059 + x = 7876 c) x – 1245 = 6478 d) 6535 – x = 4725

Home/ Toán Lớp 5: a) x + 657 = 1657 b) 4059 + x = 7876 c) x – 1245 = 6478 d) 6535 – x = 4725

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