Toán Lớp 7: ((2/193)x193/17+33/34):(7/1931+11/3862)x1931/25+9/2)
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Toán Lớp 7: ((2/193)x193/17+33/34):(7/1931+11/3862)x1931/25+9/2)
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=[(2/17+33/4)]:[(7/1931. 1931/25)+(11/3862. 1931/25)+9/2]
=(8/68+561/68):[7/25+11/50+9/2]
=37/34:[0,28+0,22+4,5]
=569/68:5
=569/68. 1/5
=569/340