[tex](13.2 5- 2 \frac{17}{20} + 2 \frac{2}{9} \times ( - 6.3)) \div 1.4 + 1 \frac{20}{21} = - \frac{13}{21} \\ 1) \: 13.25 - 2 \frac{17}{20} = 13.25 - 2.85 = 10.4 \\ 2) \: 2 \frac{2}{9} \times ( - 6.3) = - \frac{20 \times 63}{9 \times 10} = - 14 \\ 3) \: 10.4 -1 4 = - 3.6 \\ 4) \: - 3.6 \div 1.4 = - \frac{18 \times 5}{5 \times 7} = - \frac{18}{7} = - 2 \frac{4}{7} \\ 5) \: - 2 \frac{4}{7} + 1 \frac{20}{21} = - 2 \frac{12}{21} + 1 \frac{20}{21} = - 1 \frac{33}{21} + 1 \frac{20}{21} = - \frac{13}{21} [/tex]