Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{4}{11} . \frac{8}{6}\\=\frac{4}{11} . \frac{4}{3}\\=\frac{4.4}{11.3}\\=\frac{16}{33}\)
2. \(\frac{6}{2} . \frac{3}{6}\\=\frac{3}{1} . \frac{1}{2}\\=\frac{3.1}{1.2}\\=\frac{3}{2}\)
3. \(\frac{3}{12} . \frac{6}{2}\\=\frac{1}{4} . \frac{3}{1}\\=\frac{1.3}{4.1}\\=\frac{3}{4}\)
4. \(\frac{7}{12} . \frac{10}{4}\\=\frac{7}{12} . \frac{5}{2}\\=\frac{7.5}{12.2}\\=\frac{35}{24}\)
5. \(\frac{9}{9} . \frac{11}{3}\\=\frac{1}{1} . \frac{11}{3}\\=\frac{1.11}{1.3}\\=\frac{11}{3}\)
6. \(\frac{5}{2} . \frac{8}{11}\\=\frac{5.8}{2.11}\\=\frac{40}{22}\\=\frac{20}{11}\)
7. \(\frac{10}{6} . \frac{10}{6}\\=\frac{5}{3} . \frac{5}{3}\\=\frac{5.5}{3.3}\\=\frac{25}{9}\)
8. \(\frac{9}{7} . \frac{2}{2}\\=\frac{9}{7} . \frac{1}{1}\\=\frac{9.1}{7.1}\\=\frac{9}{7}\)
9. \(\frac{8}{11} . \frac{8}{9}\\=\frac{8.8}{11.9}\\=\frac{64}{99}\)
10. \(\frac{5}{4} . \frac{6}{7}\\=\frac{5.6}{4.7}\\=\frac{30}{28}\\=\frac{15}{14}\)
11. \(\frac{7}{11} . \frac{9}{5}\\=\frac{7.9}{11.5}\\=\frac{63}{55}\)
12. \(\frac{12}{7} . \frac{11}{9}\\=\frac{12.11}{7.9}\\=\frac{132}{63}\\=\frac{44}{21}\)