Tính
----- Nội dung ảnh -----
Bài 4. Tính:
a) -2,5 \(\left(-\frac{3}{25}\right)\) ; b) \(\frac{2}{3} - \frac{4}{9}\) ;
c) \(-\frac{6}{13} - \frac{9}{-26}\) ; d) \(\left(-\frac{5}{7}\right) \left(-\frac{3}{14}\right)\) .
Bài 5. Tính:
a) \(\frac{1}{6} - \frac{9}{5} \left(\frac{15}{7}\right)\) ; b) \(\frac{3}{4} + \frac{9}{7} \cdot \frac{4}{3} - \left(\frac{1}{5} - \frac{1}{3}\right)\) ;
c) \(2 + \frac{1}{4} - \frac{2}{2} \) ; d) \(\left(1 - \frac{2}{3}\right) \left(-\frac{1}{4}\right) ; \left(2 - \frac{4}{3}\right) \left(\frac{4}{5}\right)\) .
Bài 4. Tính:
a) -2,5 \(\left(-\frac{3}{25}\right)\) ; b) \(\frac{2}{3} - \frac{4}{9}\) ;
c) \(-\frac{6}{13} - \frac{9}{-26}\) ; d) \(\left(-\frac{5}{7}\right) \left(-\frac{3}{14}\right)\) .
Bài 5. Tính:
a) \(\frac{1}{6} - \frac{9}{5} \left(\frac{15}{7}\right)\) ; b) \(\frac{3}{4} + \frac{9}{7} \cdot \frac{4}{3} - \left(\frac{1}{5} - \frac{1}{3}\right)\) ;
c) \(2 + \frac{1}{4} - \frac{2}{2} \) ; d) \(\left(1 - \frac{2}{3}\right) \left(-\frac{1}{4}\right) ; \left(2 - \frac{4}{3}\right) \left(\frac{4}{5}\right)\) .