Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{6}{9} . \frac{8}{11}\\=\frac{2}{3} . \frac{8}{11}\\=\frac{2.8}{3.11}\\=\frac{16}{33}\)
2. \(\frac{8}{2} . \frac{7}{8}\\=\frac{4}{1} . \frac{7}{8}\\=\frac{4.7}{1.8}\\=\frac{28}{8}\\=\frac{7}{2}\)
3. \(\frac{4}{12} . \frac{5}{6}\\=\frac{1}{3} . \frac{5}{6}\\=\frac{1.5}{3.6}\\=\frac{5}{18}\)
4. \(\frac{3}{7} . \frac{2}{6}\\=\frac{3}{7} . \frac{1}{3}\\=\frac{3.1}{7.3}\\=\frac{3}{21}\\=\frac{1}{7}\)
5. \(\frac{10}{7} . \frac{11}{10}\\=\frac{10.11}{7.10}\\=\frac{110}{70}\\=\frac{11}{7}\)
6. \(\frac{5}{4} . \frac{8}{7}\\=\frac{5.8}{4.7}\\=\frac{40}{28}\\=\frac{10}{7}\)
7. \(\frac{10}{9} . \frac{6}{8}\\=\frac{10}{9} . \frac{3}{4}\\=\frac{10.3}{9.4}\\=\frac{30}{36}\\=\frac{5}{6}\)
8. \(\frac{4}{12} . \frac{12}{4}\\=\frac{1}{3} . \frac{3}{1}\\=\frac{1.3}{3.1}\\=\frac{3}{3}\\=\frac{1}{1}= 1\)
9. \(\frac{11}{7} . \frac{12}{6}\\=\frac{11}{7} . \frac{2}{1}\\=\frac{11.2}{7.1}\\=\frac{22}{7}\)
10. \(\frac{5}{2} . \frac{3}{5}\\=\frac{5.3}{2.5}\\=\frac{15}{10}\\=\frac{3}{2}\)
11. \(\frac{3}{12} . \frac{7}{2}\\=\frac{1}{4} . \frac{7}{2}\\=\frac{1.7}{4.2}\\=\frac{7}{8}\)
12. \(\frac{4}{10} . \frac{12}{9}\\=\frac{2}{5} . \frac{4}{3}\\=\frac{2.4}{5.3}\\=\frac{8}{15}\)