E
[tex] \frac{3}{6} - \frac{1}{2} \times \frac{1}{3} = \frac{3}{6} - \frac{1 \times 1}{2 \times 3} = \frac{3}{6} - \frac{1}{6} = \frac{2}{6} = \frac{1}{3} [/tex]
F
[tex] \frac{3}{4} \times \frac{ - 4}{6} - \frac{1}{2} = - \frac{12}{24} - \frac{1}{2} = - \frac{1}{2} - \frac{1}{2} = - 1[/tex]
G
[tex] \frac{4}{7} \times ( \frac{1}{4} + \frac{3}{2} ) = \frac{4}{7} \times ( \frac{1}{4} + \frac{6}{4} ) = \frac{4}{7} \times \frac{7}{4} = 1[/tex]
G
[tex] \frac{28}{5} \times ( \frac{1}{7} - \frac{1}{2}) = \frac{28}{5} \times(\frac{2}{14} - \frac{7}{14}) = \frac{28}{5} \times\frac{ - 5}{14}= \frac{ - 28}{14} [/tex] = - 2[/tex]
