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1 + 9 = 10
2 + 8 = 10
3 + 7 = 10
4 + 6 = 10
Có thể lập tất cả: 1/9 ; 2/8 ; 3/7 ; 4/6
Ta có:\(\frac{7}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{1}{8}+\frac{1}{4}+\frac{1}{2}\)
Vậy \(\frac{7}{8}=\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\)
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a) \(\frac{3}{10};\frac{4}{10};\frac{7}{10}\)
b) \(\frac{1}{5};\frac{1}{25};\frac{1}{99}\)
c) \(\frac{9}{10};\frac{13}{60};\frac{14}{60}\)
10/27 = 1/27 + 2/27 + 7/27
nhanh mình k cho