Sắp xếp các hỗn số \(5\frac{2}{5};\,\,7\frac{2}{7};\,\,5\frac{4}{5};\,\,7\frac{4}{7}\) theo thứ tự từ lớn đến bé, ta được dãy số:

a) \(4\frac{1}{4}\,\, - \,\,2\frac{5}{8}\,\, + \,\,2\frac{3}{5}\)  

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b) \(5\frac{1}{7}\,\, - \,\,2\frac{4}{5}\,\,:\,\,1\frac{1}{5}\)

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c) \(2\frac{3}{5}\,\, + \,\,1\frac{1}{4}\,\, \times \,\,2\frac{2}{3}\)  

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= .....................................................

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d) \(4\frac{1}{3}\,\, \times \,\,1\frac{1}{2}\,\, + \,\,5\frac{2}{7}\)

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\(1\frac{4}{5}\,\, = \,\,\frac{{.......}}{{.......}}\,\, = \,\,\frac{{.......}}{{.......}}\)

\(5\frac{1}{{20}}\,\, = \,\,\frac{{.......}}{{.......}}\,\, = \,\,\frac{{.......}}{{.......}}\)

\(6\frac{7}{{10}}\,\,\, = \,\,\,\frac{{.......}}{{.......}}\,\,\, = \,\,\,\frac{{.......}}{{.......}}\)

\(3\frac{3}{{50}}\,\,\, = \,\,\,\frac{{.......}}{{.......}}\,\, = \,\,\frac{{.......}}{{.......}}\)