Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{12}{12} . \frac{11}{10}\\=\frac{1}{1} . \frac{11}{10}\\=\frac{1.11}{1.10}\\=\frac{11}{10}\)
2. \(\frac{5}{12} . \frac{5}{2}\\=\frac{5.5}{12.2}\\=\frac{25}{24}\)
3. \(\frac{12}{6} . \frac{4}{7}\\=\frac{2}{1} . \frac{4}{7}\\=\frac{2.4}{1.7}\\=\frac{8}{7}\)
4. \(\frac{10}{9} . \frac{11}{11}\\=\frac{10}{9} . \frac{1}{1}\\=\frac{10.1}{9.1}\\=\frac{10}{9}\)
5. \(\frac{10}{5} . \frac{4}{3}\\=\frac{2}{1} . \frac{4}{3}\\=\frac{2.4}{1.3}\\=\frac{8}{3}\)
6. \(\frac{2}{10} . \frac{7}{8}\\=\frac{1}{5} . \frac{7}{8}\\=\frac{1.7}{5.8}\\=\frac{7}{40}\)
7. \(\frac{5}{4} . \frac{12}{11}\\=\frac{5.12}{4.11}\\=\frac{60}{44}\\=\frac{15}{11}\)
8. \(\frac{6}{12} . \frac{9}{4}\\=\frac{1}{2} . \frac{9}{4}\\=\frac{1.9}{2.4}\\=\frac{9}{8}\)
9. \(\frac{5}{9} . \frac{7}{5}\\=\frac{5.7}{9.5}\\=\frac{35}{45}\\=\frac{7}{9}\)
10. \(\frac{7}{7} . \frac{12}{10}\\=\frac{1}{1} . \frac{6}{5}\\=\frac{1.6}{1.5}\\=\frac{6}{5}\)
11. \(\frac{3}{9} . \frac{8}{3}\\=\frac{1}{3} . \frac{8}{3}\\=\frac{1.8}{3.3}\\=\frac{8}{9}\)
12. \(\frac{2}{10} . \frac{3}{4}\\=\frac{1}{5} . \frac{3}{4}\\=\frac{1.3}{5.4}\\=\frac{3}{20}\)