Thực hiện phép tính
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5) \(-2 \frac{1}{2} - 3 \frac{1}{4}\)
6) \(-4 \frac{1}{2} + 2 \frac{3}{10}\)
7) \(-\frac{5}{18} + \frac{5}{45} - \frac{9}{6}\)
8) \(2, 4. \left( -\frac{3}{4} \frac{3}{7} \right)\)
9) \(-\frac{24}{5} - \frac{15}{8}\)
10) \(\frac{2}{3} + -\frac{3}{4} + \frac{2}{6}\)
11) \(-\frac{12}{21} \cdot \frac{1}{6}\)
12) \(1, 25 : \left( -\frac{3}{1} \frac{8}{1} \right)\)
5) \(-2 \frac{1}{2} - 3 \frac{1}{4}\)
6) \(-4 \frac{1}{2} + 2 \frac{3}{10}\)
7) \(-\frac{5}{18} + \frac{5}{45} - \frac{9}{6}\)
8) \(2, 4. \left( -\frac{3}{4} \frac{3}{7} \right)\)
9) \(-\frac{24}{5} - \frac{15}{8}\)
10) \(\frac{2}{3} + -\frac{3}{4} + \frac{2}{6}\)
11) \(-\frac{12}{21} \cdot \frac{1}{6}\)
12) \(1, 25 : \left( -\frac{3}{1} \frac{8}{1} \right)\)