Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{9}{7} . \frac{10}{11}\\=\frac{9.10}{7.11}\\=\frac{90}{77}\)
2. \(\frac{7}{7} . \frac{12}{10}\\=\frac{1}{1} . \frac{6}{5}\\=\frac{1.6}{1.5}\\=\frac{6}{5}\)
3. \(\frac{11}{5} . \frac{4}{6}\\=\frac{11}{5} . \frac{2}{3}\\=\frac{11.2}{5.3}\\=\frac{22}{15}\)
4. \(\frac{2}{11} . \frac{10}{7}\\=\frac{2.10}{11.7}\\=\frac{20}{77}\)
5. \(\frac{4}{3} . \frac{9}{3}\\=\frac{4}{3} . \frac{3}{1}\\=\frac{4.3}{3.1}\\=\frac{12}{3}\\=\frac{4}{1}= 4\)
6. \(\frac{5}{10} . \frac{12}{3}\\=\frac{1}{2} . \frac{4}{1}\\=\frac{1.4}{2.1}\\=\frac{4}{2}\\=\frac{2}{1}= 2\)
7. \(\frac{10}{8} . \frac{7}{4}\\=\frac{5}{4} . \frac{7}{4}\\=\frac{5.7}{4.4}\\=\frac{35}{16}\)
8. \(\frac{12}{8} . \frac{8}{8}\\=\frac{3}{2} . \frac{1}{1}\\=\frac{3.1}{2.1}\\=\frac{3}{2}\)
9. \(\frac{8}{6} . \frac{12}{12}\\=\frac{4}{3} . \frac{1}{1}\\=\frac{4.1}{3.1}\\=\frac{4}{3}\)
10. \(\frac{12}{3} . \frac{8}{3}\\=\frac{4}{1} . \frac{8}{3}\\=\frac{4.8}{1.3}\\=\frac{32}{3}\)
11. \(\frac{12}{10} . \frac{12}{11}\\=\frac{6}{5} . \frac{12}{11}\\=\frac{6.12}{5.11}\\=\frac{72}{55}\)
12. \(\frac{4}{11} . \frac{12}{11}\\=\frac{4.12}{11.11}\\=\frac{48}{121}\)