Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{10}{11} . \frac{5}{12}\\=\frac{10.5}{11.12}\\=\frac{50}{132}\\=\frac{25}{66}\)
2. \(\frac{4}{9} . \frac{6}{5}\\=\frac{4.6}{9.5}\\=\frac{24}{45}\\=\frac{8}{15}\)
3. \(\frac{8}{5} . \frac{10}{12}\\=\frac{8}{5} . \frac{5}{6}\\=\frac{8.5}{5.6}\\=\frac{40}{30}\\=\frac{4}{3}\)
4. \(\frac{2}{9} . \frac{10}{10}\\=\frac{2}{9} . \frac{1}{1}\\=\frac{2.1}{9.1}\\=\frac{2}{9}\)
5. \(\frac{8}{3} . \frac{9}{9}\\=\frac{8}{3} . \frac{1}{1}\\=\frac{8.1}{3.1}\\=\frac{8}{3}\)
6. \(\frac{8}{6} . \frac{4}{10}\\=\frac{4}{3} . \frac{2}{5}\\=\frac{4.2}{3.5}\\=\frac{8}{15}\)
7. \(\frac{8}{3} . \frac{11}{10}\\=\frac{8.11}{3.10}\\=\frac{88}{30}\\=\frac{44}{15}\)
8. \(\frac{5}{6} . \frac{12}{7}\\=\frac{5.12}{6.7}\\=\frac{60}{42}\\=\frac{10}{7}\)
9. \(\frac{2}{5} . \frac{12}{12}\\=\frac{2}{5} . \frac{1}{1}\\=\frac{2.1}{5.1}\\=\frac{2}{5}\)
10. \(\frac{12}{3} . \frac{9}{5}\\=\frac{4}{1} . \frac{9}{5}\\=\frac{4.9}{1.5}\\=\frac{36}{5}\)
11. \(\frac{9}{5} . \frac{6}{10}\\=\frac{9}{5} . \frac{3}{5}\\=\frac{9.3}{5.5}\\=\frac{27}{25}\)
12. \(\frac{11}{11} . \frac{6}{11}\\=\frac{1}{1} . \frac{6}{11}\\=\frac{1.6}{1.11}\\=\frac{6}{11}\)