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chuchutv
2 năm trước
Câu 1: 4 giờ 25 giây = … giây Câu 2: Cho một phép chia hết có thương là 32. Tìm số bị chia biết rằng nếu ta tăng thương lên 1 đơnvị thì số bị chia tăng lên 138 đơnvị. Số bị chia là: A. 1408 B. 1440 C. 4416 D. 1376 Câu 3: 5 năm trước tổng số tuổi của hai mẹ con là 55 tuổi. Hiện nay tuổi con bằng 4/9 lần tuổi mẹ. Tính số tuổi của mẹ và tuổi con hiện nay?
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