Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{10}{6} . \frac{8}{9}\\=\frac{5}{3} . \frac{8}{9}\\=\frac{5.8}{3.9}\\=\frac{40}{27}\)
2. \(\frac{3}{8} . \frac{9}{8}\\=\frac{3.9}{8.8}\\=\frac{27}{64}\)
3. \(\frac{5}{5} . \frac{6}{5}\\=\frac{1}{1} . \frac{6}{5}\\=\frac{1.6}{1.5}\\=\frac{6}{5}\)
4. \(\frac{5}{2} . \frac{10}{4}\\=\frac{5}{2} . \frac{5}{2}\\=\frac{5.5}{2.2}\\=\frac{25}{4}\)
5. \(\frac{8}{2} . \frac{9}{5}\\=\frac{4}{1} . \frac{9}{5}\\=\frac{4.9}{1.5}\\=\frac{36}{5}\)
6. \(\frac{6}{9} . \frac{12}{11}\\=\frac{2}{3} . \frac{12}{11}\\=\frac{2.12}{3.11}\\=\frac{24}{33}\\=\frac{8}{11}\)
7. \(\frac{5}{7} . \frac{8}{2}\\=\frac{5}{7} . \frac{4}{1}\\=\frac{5.4}{7.1}\\=\frac{20}{7}\)
8. \(\frac{6}{4} . \frac{7}{5}\\=\frac{3}{2} . \frac{7}{5}\\=\frac{3.7}{2.5}\\=\frac{21}{10}\)
9. \(\frac{6}{9} . \frac{7}{10}\\=\frac{2}{3} . \frac{7}{10}\\=\frac{2.7}{3.10}\\=\frac{14}{30}\\=\frac{7}{15}\)
10. \(\frac{10}{3} . \frac{10}{8}\\=\frac{10}{3} . \frac{5}{4}\\=\frac{10.5}{3.4}\\=\frac{50}{12}\\=\frac{25}{6}\)
11. \(\frac{2}{7} . \frac{11}{9}\\=\frac{2.11}{7.9}\\=\frac{22}{63}\)
12. \(\frac{8}{7} . \frac{11}{6}\\=\frac{8.11}{7.6}\\=\frac{88}{42}\\=\frac{44}{21}\)