Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{4}{10} . \frac{9}{4}\\=\frac{2}{5} . \frac{9}{4}\\=\frac{2.9}{5.4}\\=\frac{18}{20}\\=\frac{9}{10}\)
2. \(\frac{9}{10} . \frac{2}{3}\\=\frac{9.2}{10.3}\\=\frac{18}{30}\\=\frac{3}{5}\)
3. \(\frac{6}{4} . \frac{6}{4}\\=\frac{3}{2} . \frac{3}{2}\\=\frac{3.3}{2.2}\\=\frac{9}{4}\)
4. \(\frac{3}{9} . \frac{5}{7}\\=\frac{1}{3} . \frac{5}{7}\\=\frac{1.5}{3.7}\\=\frac{5}{21}\)
5. \(\frac{4}{7} . \frac{9}{11}\\=\frac{4.9}{7.11}\\=\frac{36}{77}\)
6. \(\frac{3}{9} . \frac{10}{2}\\=\frac{1}{3} . \frac{5}{1}\\=\frac{1.5}{3.1}\\=\frac{5}{3}\)
7. \(\frac{3}{10} . \frac{2}{4}\\=\frac{3}{10} . \frac{1}{2}\\=\frac{3.1}{10.2}\\=\frac{3}{20}\)
8. \(\frac{3}{5} . \frac{11}{10}\\=\frac{3.11}{5.10}\\=\frac{33}{50}\)
9. \(\frac{6}{12} . \frac{6}{6}\\=\frac{1}{2} . \frac{1}{1}\\=\frac{1.1}{2.1}\\=\frac{1}{2}\)
10. \(\frac{8}{6} . \frac{2}{5}\\=\frac{4}{3} . \frac{2}{5}\\=\frac{4.2}{3.5}\\=\frac{8}{15}\)
11. \(\frac{10}{6} . \frac{4}{7}\\=\frac{5}{3} . \frac{4}{7}\\=\frac{5.4}{3.7}\\=\frac{20}{21}\)
12. \(\frac{12}{2} . \frac{2}{5}\\=\frac{6}{1} . \frac{2}{5}\\=\frac{6.2}{1.5}\\=\frac{12}{5}\)