حاصل عبارت های زیر را به دست آورید.

پاسخ

$$
(-\frac{6}{17})+(-\frac{-8}{17})=\frac{-6+8}{17} = \frac{2}{17}\\[2ex]
(-\frac{12}{35})-(+\frac{11}{42})=\frac{-72-55}{210}=-\frac{127}{210}\\[2ex]
(-\frac{2}{63})-(-\frac{5}{72})=\frac{-16+35}{504}=\frac{19}{504}\\[2ex]
-\frac{7}{12} + (-3) = \frac{-7-36}{12} = -\frac{43}{12}\\[2ex]
(+\frac{2}{11}) \times (-\frac{6}{9})= -\frac{4}{33}\\[2ex]
(-\frac{1}{10}) \times (+\frac{8}{12}) = -\frac{1}{15}\\[2ex]
-8 \div (+5) = -\frac{8}{1} \times \frac{1}{5} = -\frac{8}{5}\\[2ex]
(-12) \div (-28) = -\frac{12}{1} \times -\frac{1}{28} = \frac{3}{7}\\[2ex]
(-\frac{7}{9}) \div (-\frac{28}{27}) = -\frac{7}{9} \times (-\frac{27}{28}) = \frac{3}{4}\\[2ex]
-2.4 \div 1.2 = -2\frac{4}{10} \div 1\frac{2}{10} = -\frac{24}{10} \div \frac{12}{10} = -\frac{24}{10} \times \frac{10}{12} = -2
$$