Tính hợp lý
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Bài 2. Tính hợp lý
a) \(-\frac{3}{5} + \frac{7}{21} - \frac{4}{5} + \frac{7}{5}\)
b) \(\left(\frac{1}{4} + \frac{-5}{13}\right) \left(\frac{8}{13} \frac{2}{11}\right) = \frac{-3}{4}\)
c) \(\frac{11}{15} + \frac{4}{7} + \frac{3}{17} + \frac{11}{15}\)
d) \(\frac{-3}{8} - \frac{25}{7} + \frac{25}{18} + 2 \frac{3}{8}\)
e) \(\frac{-9}{16} \cdot \frac{13}{3} \cdot \left(-\frac{3}{4}\right)^{\frac{19}{3}}\)
f) \(\frac{11}{17} + \frac{9}{23} - \frac{11}{32} \cdot \frac{17}{17}\)
Bài 2. Tính hợp lý
a) \(-\frac{3}{5} + \frac{7}{21} - \frac{4}{5} + \frac{7}{5}\)
b) \(\left(\frac{1}{4} + \frac{-5}{13}\right) \left(\frac{8}{13} \frac{2}{11}\right) = \frac{-3}{4}\)
c) \(\frac{11}{15} + \frac{4}{7} + \frac{3}{17} + \frac{11}{15}\)
d) \(\frac{-3}{8} - \frac{25}{7} + \frac{25}{18} + 2 \frac{3}{8}\)
e) \(\frac{-9}{16} \cdot \frac{13}{3} \cdot \left(-\frac{3}{4}\right)^{\frac{19}{3}}\)
f) \(\frac{11}{17} + \frac{9}{23} - \frac{11}{32} \cdot \frac{17}{17}\)