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diemquynh0801
2 năm trước
bài 7 hòa làm 1 phép cộng có tổng bằng số hạng thứ nhất .hỏi số hạng thứ 2 có tổng là số nào? b phép cộng nào có hạng thứ nhất bằng số hạng thứ 2 và bằng tổng số ? giúp nha
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