Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{11}{10} . \frac{12}{9}\\=\frac{11}{10} . \frac{4}{3}\\=\frac{11.4}{10.3}\\=\frac{44}{30}\\=\frac{22}{15}\)
2. \(\frac{5}{11} . \frac{7}{2}\\=\frac{5.7}{11.2}\\=\frac{35}{22}\)
3. \(\frac{10}{10} . \frac{3}{2}\\=\frac{1}{1} . \frac{3}{2}\\=\frac{1.3}{1.2}\\=\frac{3}{2}\)
4. \(\frac{5}{5} . \frac{7}{9}\\=\frac{1}{1} . \frac{7}{9}\\=\frac{1.7}{1.9}\\=\frac{7}{9}\)
5. \(\frac{8}{2} . \frac{5}{12}\\=\frac{4}{1} . \frac{5}{12}\\=\frac{4.5}{1.12}\\=\frac{20}{12}\\=\frac{5}{3}\)
6. \(\frac{4}{9} . \frac{11}{3}\\=\frac{4.11}{9.3}\\=\frac{44}{27}\)
7. \(\frac{12}{7} . \frac{11}{3}\\=\frac{12.11}{7.3}\\=\frac{132}{21}\\=\frac{44}{7}\)
8. \(\frac{8}{7} . \frac{4}{6}\\=\frac{8}{7} . \frac{2}{3}\\=\frac{8.2}{7.3}\\=\frac{16}{21}\)
9. \(\frac{7}{11} . \frac{10}{7}\\=\frac{7.10}{11.7}\\=\frac{70}{77}\\=\frac{10}{11}\)
10. \(\frac{3}{10} . \frac{12}{8}\\=\frac{3}{10} . \frac{3}{2}\\=\frac{3.3}{10.2}\\=\frac{9}{20}\)
11. \(\frac{12}{9} . \frac{4}{3}\\=\frac{4}{3} . \frac{4}{3}\\=\frac{4.4}{3.3}\\=\frac{16}{9}\)
12. \(\frac{10}{12} . \frac{8}{3}\\=\frac{5}{6} . \frac{8}{3}\\=\frac{5.8}{6.3}\\=\frac{40}{18}\\=\frac{20}{9}\)