Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{4}{9} . \frac{2}{5}\\=\frac{4.2}{9.5}\\=\frac{8}{45}\)
2. \(\frac{5}{3} . \frac{5}{5}\\=\frac{5}{3} . \frac{1}{1}\\=\frac{5.1}{3.1}\\=\frac{5}{3}\)
3. \(\frac{3}{11} . \frac{2}{8}\\=\frac{3}{11} . \frac{1}{4}\\=\frac{3.1}{11.4}\\=\frac{3}{44}\)
4. \(\frac{3}{2} . \frac{7}{11}\\=\frac{3.7}{2.11}\\=\frac{21}{22}\)
5. \(\frac{9}{2} . \frac{5}{9}\\=\frac{9.5}{2.9}\\=\frac{45}{18}\\=\frac{5}{2}\)
6. \(\frac{7}{3} . \frac{8}{2}\\=\frac{7}{3} . \frac{4}{1}\\=\frac{7.4}{3.1}\\=\frac{28}{3}\)
7. \(\frac{2}{10} . \frac{12}{6}\\=\frac{1}{5} . \frac{2}{1}\\=\frac{1.2}{5.1}\\=\frac{2}{5}\)
8. \(\frac{3}{2} . \frac{6}{6}\\=\frac{3}{2} . \frac{1}{1}\\=\frac{3.1}{2.1}\\=\frac{3}{2}\)
9. \(\frac{5}{9} . \frac{6}{10}\\=\frac{5}{9} . \frac{3}{5}\\=\frac{5.3}{9.5}\\=\frac{15}{45}\\=\frac{1}{3}\)
10. \(\frac{10}{4} . \frac{3}{9}\\=\frac{5}{2} . \frac{1}{3}\\=\frac{5.1}{2.3}\\=\frac{5}{6}\)
11. \(\frac{8}{11} . \frac{5}{9}\\=\frac{8.5}{11.9}\\=\frac{40}{99}\)
12. \(\frac{6}{3} . \frac{5}{3}\\=\frac{2}{1} . \frac{5}{3}\\=\frac{2.5}{1.3}\\=\frac{10}{3}\)