Explicație pas cu pas:
[tex]3. \: a) \: \\ 2 \times \frac{3}{7} = \frac{6}{7} \\ 2 \frac{3}{7} = \frac{17}{7} \\ \\ b) \: 4 \times \frac{1}{8} = \frac{4}{8} = \frac{1}{2} \\ 4 \frac{1}{8} = \frac{33}{8} \\ \\ c) \: 3 \times \frac{2}{9} = \frac{6}{9} = \frac{2}{3} \\ 3 \frac{2}{9} = \frac{29}{9} \\ \\ d) \: 5 \times \frac{1}{4} = \frac{5}{4} \\ 5 \frac{1}{4} = \frac{21}{4} \\ \\ e) \: 7 \times \frac{1}{4} = \frac{7}{4} \\ 7 \frac{1}{4} = \frac{29}{4} \\ \\ f) \: 12 \times \frac{5}{6} = \frac{60}{6} = 10 \\ 12 \frac{5}{6} = \frac{77}{6} [/tex]
