Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{7}{2} . \frac{4}{12}\\=\frac{7}{2} . \frac{1}{3}\\=\frac{7.1}{2.3}\\=\frac{7}{6}\)
2. \(\frac{3}{9} . \frac{10}{3}\\=\frac{1}{3} . \frac{10}{3}\\=\frac{1.10}{3.3}\\=\frac{10}{9}\)
3. \(\frac{7}{8} . \frac{9}{4}\\=\frac{7.9}{8.4}\\=\frac{63}{32}\)
4. \(\frac{9}{10} . \frac{7}{11}\\=\frac{9.7}{10.11}\\=\frac{63}{110}\)
5. \(\frac{2}{6} . \frac{6}{10}\\=\frac{1}{3} . \frac{3}{5}\\=\frac{1.3}{3.5}\\=\frac{3}{15}\\=\frac{1}{5}\)
6. \(\frac{4}{3} . \frac{3}{12}\\=\frac{4}{3} . \frac{1}{4}\\=\frac{4.1}{3.4}\\=\frac{4}{12}\\=\frac{1}{3}\)
7. \(\frac{9}{5} . \frac{10}{8}\\=\frac{9}{5} . \frac{5}{4}\\=\frac{9.5}{5.4}\\=\frac{45}{20}\\=\frac{9}{4}\)
8. \(\frac{7}{6} . \frac{10}{4}\\=\frac{7}{6} . \frac{5}{2}\\=\frac{7.5}{6.2}\\=\frac{35}{12}\)
9. \(\frac{3}{7} . \frac{6}{8}\\=\frac{3}{7} . \frac{3}{4}\\=\frac{3.3}{7.4}\\=\frac{9}{28}\)
10. \(\frac{5}{4} . \frac{5}{3}\\=\frac{5.5}{4.3}\\=\frac{25}{12}\)
11. \(\frac{4}{3} . \frac{2}{7}\\=\frac{4.2}{3.7}\\=\frac{8}{21}\)
12. \(\frac{3}{2} . \frac{6}{8}\\=\frac{3}{2} . \frac{3}{4}\\=\frac{3.3}{2.4}\\=\frac{9}{8}\)