Tính hợp lí
làm oki thì 10 nhâ
----- Nội dung ảnh -----
Bài tập 5. Tính hợp lí
a) \(\left( -\frac{2}{3} + \frac{3}{7} \right) \cdot \frac{4}{5} + \left( -\frac{1}{3} + \frac{4}{7} \right) \cdot \frac{4}{5}\)
b) \(\frac{5}{9} \cdot \left( \frac{1}{11} - \frac{5}{22} \right) + \frac{5}{9} \cdot \left( \frac{1}{15} - \frac{2}{3} \right)\)
c) \(\left( \frac{3}{17} - \frac{5}{12} \right) \cdot \frac{4}{5} - \left( \frac{3}{7} - \frac{17}{12} \right) \cdot \frac{4}{5}\)
d) \(\frac{29}{19} - \frac{49}{19} + \frac{34}{51} - \frac{32}{51}\)
e) \(\left( -\frac{7}{9} + \frac{3}{11} \right) \cdot \frac{3}{4} - \left( \frac{2}{9} - \frac{19}{11} \right) \cdot \frac{3}{4}\)
f) \(\frac{1}{5} + \frac{3}{10} - \frac{4}{5} + 3 \cdot \frac{8}{5}\)
----- Nội dung ảnh -----
Bài tập 5. Tính hợp lí
a) \(\left( -\frac{2}{3} + \frac{3}{7} \right) \cdot \frac{4}{5} + \left( -\frac{1}{3} + \frac{4}{7} \right) \cdot \frac{4}{5}\)
b) \(\frac{5}{9} \cdot \left( \frac{1}{11} - \frac{5}{22} \right) + \frac{5}{9} \cdot \left( \frac{1}{15} - \frac{2}{3} \right)\)
c) \(\left( \frac{3}{17} - \frac{5}{12} \right) \cdot \frac{4}{5} - \left( \frac{3}{7} - \frac{17}{12} \right) \cdot \frac{4}{5}\)
d) \(\frac{29}{19} - \frac{49}{19} + \frac{34}{51} - \frac{32}{51}\)
e) \(\left( -\frac{7}{9} + \frac{3}{11} \right) \cdot \frac{3}{4} - \left( \frac{2}{9} - \frac{19}{11} \right) \cdot \frac{3}{4}\)
f) \(\frac{1}{5} + \frac{3}{10} - \frac{4}{5} + 3 \cdot \frac{8}{5}\)