[tex]a) \frac{4}{5} \times 1 \times \frac{1}{4} \times \frac{2}{3} \: n \\ \: b) 4 \times \frac{1}{3} \times (1 \times \frac{2}{3} \times \frac{3}{5} ) \\ c) 2 \times \frac{3}{7} \times \frac{7}{17} \times 1 \times \frac{1}{8} [/tex]
ajutați va rog frumos ​