Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

1. \(\frac{4}{7} . \frac{11}{6}\)
2. \(\frac{9}{8} . \frac{11}{2}\)
3. \(\frac{5}{10} . \frac{11}{9}\)
4. \(\frac{6}{6} . \frac{5}{11}\)
5. \(\frac{4}{5} . \frac{7}{4}\)
6. \(\frac{7}{5} . \frac{2}{8}\)
7. \(\frac{5}{11} . \frac{7}{6}\)
8. \(\frac{7}{10} . \frac{12}{6}\)
9. \(\frac{6}{3} . \frac{4}{2}\)
10. \(\frac{4}{3} . \frac{8}{7}\)
11. \(\frac{10}{11} . \frac{2}{6}\)
12. \(\frac{9}{7} . \frac{5}{12}\)

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{4}{7} . \frac{11}{6}\\=\frac{4.11}{7.6}\\=\frac{44}{42}\\=\frac{22}{21}\)
2. \(\frac{9}{8} . \frac{11}{2}\\=\frac{9.11}{8.2}\\=\frac{99}{16}\)
3. \(\frac{5}{10} . \frac{11}{9}\\=\frac{1}{2} . \frac{11}{9}\\=\frac{1.11}{2.9}\\=\frac{11}{18}\)
4. \(\frac{6}{6} . \frac{5}{11}\\=\frac{1}{1} . \frac{5}{11}\\=\frac{1.5}{1.11}\\=\frac{5}{11}\)
5. \(\frac{4}{5} . \frac{7}{4}\\=\frac{4.7}{5.4}\\=\frac{28}{20}\\=\frac{7}{5}\)
6. \(\frac{7}{5} . \frac{2}{8}\\=\frac{7}{5} . \frac{1}{4}\\=\frac{7.1}{5.4}\\=\frac{7}{20}\)
7. \(\frac{5}{11} . \frac{7}{6}\\=\frac{5.7}{11.6}\\=\frac{35}{66}\)
8. \(\frac{7}{10} . \frac{12}{6}\\=\frac{7}{10} . \frac{2}{1}\\=\frac{7.2}{10.1}\\=\frac{14}{10}\\=\frac{7}{5}\)
9. \(\frac{6}{3} . \frac{4}{2}\\=\frac{2}{1} . \frac{2}{1}\\=\frac{2.2}{1.1}\\=\frac{4}{1}= 4\)
10. \(\frac{4}{3} . \frac{8}{7}\\=\frac{4.8}{3.7}\\=\frac{32}{21}\)
11. \(\frac{10}{11} . \frac{2}{6}\\=\frac{10}{11} . \frac{1}{3}\\=\frac{10.1}{11.3}\\=\frac{10}{33}\)
12. \(\frac{9}{7} . \frac{5}{12}\\=\frac{9.5}{7.12}\\=\frac{45}{84}\\=\frac{15}{28}\)