Vermenigvuldig de breuken
- \(\frac{2}{13} . \frac{9}{10}\)
- \(\frac{7}{-2} . \frac{11}{12}\)
- \(\frac{10}{11} . \left(\frac{11}{-5}\right)\)
- \(\frac{3}{-14} . \left(\frac{11}{-6}\right)\)
- \(\frac{-7}{-9} . \left(\frac{-11}{11}\right)\)
- \(\frac{-10}{19} . \frac{4}{6}\)
- \(\frac{9}{11} . \frac{8}{3}\)
- \(\frac{11}{15} . \left(\frac{4}{-10}\right)\)
- \(\frac{4}{15} . \left(\frac{-7}{-4}\right)\)
- \(\frac{-12}{-5} . \left(\frac{2}{-6}\right)\)
- \(\frac{-10}{11} . \frac{8}{4}\)
- \(\frac{9}{-8} . \left(\frac{12}{-6}\right)\)
Vermenigvuldig de breuken
Verbetersleutel
- \(\frac{2}{13} . \frac{9}{10}\\=+\frac{2.9}{13.10}\\=\frac{18}{130}\\=\frac{9}{65}\)
- \(\frac{7}{-2} . \frac{11}{12}\\=-\frac{7.11}{2.12}\\=-\frac{77}{24}\)
- \(\frac{10}{11} . \left(\frac{11}{-5}\right)\\=-\frac{10.11}{11.5}\\=-\frac{110}{55}\\=-\frac{2}{1}= 2\)
- \(\frac{3}{-14} . \left(\frac{11}{-6}\right)\\=+\frac{3.11}{14.6}\\=\frac{33}{84}\\=\frac{11}{28}\)
- \(\frac{-7}{-9} . \left(\frac{-11}{11}\right)\\=-\frac{7}{9}.\frac{1}{1}\\=-\frac{7.1}{9.1}\\=-\frac{7}{9}\)
- \(\frac{-10}{19} . \frac{4}{6}\\=-\frac{10}{19}.\frac{2}{3}\\=-\frac{10.2}{19.3}\\=-\frac{20}{57}\)
- \(\frac{9}{11} . \frac{8}{3}\\=+\frac{9.8}{11.3}\\=\frac{72}{33}\\=\frac{24}{11}\)
- \(\frac{11}{15} . \left(\frac{4}{-10}\right)\\=-\frac{11}{15}.\frac{2}{5}\\=-\frac{11.2}{15.5}\\=-\frac{22}{75}\)
- \(\frac{4}{15} . \left(\frac{-7}{-4}\right)\\=+\frac{4.7}{15.4}\\=\frac{28}{60}\\=\frac{7}{15}\)
- \(\frac{-12}{-5} . \left(\frac{2}{-6}\right)\\=-\frac{12}{5}.\frac{1}{3}\\=-\frac{12.1}{5.3}\\=-\frac{12}{15}\\=-\frac{4}{5}\)
- \(\frac{-10}{11} . \frac{8}{4}\\=-\frac{10}{11}.\frac{2}{1}\\=-\frac{10.2}{11.1}\\=-\frac{20}{11}\)
- \(\frac{9}{-8} . \left(\frac{12}{-6}\right)\\=+\frac{9}{8}.\frac{2}{1}\\=+\frac{9.2}{8.1}\\=\frac{18}{8}\\=\frac{9}{4}\)