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ctvloga378
2 năm trước
tính bằng cách thuận tiện a, 17,5 x 4 x 3 x 2,5 b, 25,6 x 7,5 + 25,6 x 2,5 c, 4,52 x 12,5 - 2,5 x 4,25 d, 0,25 x 0,68 x 40
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