Breuken verm. (reeks 2)

Hoofdmenu Eentje per keer  🖨

Vermenigvuldig de breuken

1. \(\frac{-5}{7} . \left(\frac{4}{-2}\right)\)
2. \(\frac{9}{17} . \frac{10}{12}\)
3. \(\frac{-10}{9} . \left(\frac{-2}{2}\right)\)
4. \(\frac{-9}{-13} . \left(\frac{7}{-10}\right)\)
5. \(\frac{-9}{-19} . \left(\frac{-10}{8}\right)\)
6. \(\frac{4}{5} . \left(\frac{11}{-3}\right)\)
7. \(\frac{-5}{-17} . \left(\frac{-4}{5}\right)\)
8. \(\frac{-6}{-11} . \left(\frac{-3}{7}\right)\)
9. \(\frac{-3}{7} . \frac{2}{11}\)
10. \(\frac{-10}{17} . \left(\frac{-7}{3}\right)\)
11. \(\frac{-7}{10} . \frac{4}{2}\)
12. \(\frac{-11}{-7} . \left(\frac{-8}{5}\right)\)

---

Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{-5}{7} . \left(\frac{4}{-2}\right)\\=+\frac{5}{7}.\frac{2}{1}\\=+\frac{5.2}{7.1}\\=\frac{10}{7}\)
2. \(\frac{9}{17} . \frac{10}{12}\\=+\frac{9}{17}.\frac{5}{6}\\=+\frac{9.5}{17.6}\\=\frac{45}{102}\\=\frac{15}{34}\)
3. \(\frac{-10}{9} . \left(\frac{-2}{2}\right)\\=+\frac{10}{9}.\frac{1}{1}\\=+\frac{10.1}{9.1}\\=\frac{10}{9}\)
4. \(\frac{-9}{-13} . \left(\frac{7}{-10}\right)\\=-\frac{9.7}{13.10}\\=-\frac{63}{130}\)
5. \(\frac{-9}{-19} . \left(\frac{-10}{8}\right)\\=-\frac{9}{19}.\frac{5}{4}\\=-\frac{9.5}{19.4}\\=-\frac{45}{76}\)
6. \(\frac{4}{5} . \left(\frac{11}{-3}\right)\\=-\frac{4.11}{5.3}\\=-\frac{44}{15}\)
7. \(\frac{-5}{-17} . \left(\frac{-4}{5}\right)\\=-\frac{5.4}{17.5}\\=-\frac{20}{85}\\=-\frac{4}{17}\)
8. \(\frac{-6}{-11} . \left(\frac{-3}{7}\right)\\=-\frac{6.3}{11.7}\\=-\frac{18}{77}\)
9. \(\frac{-3}{7} . \frac{2}{11}\\=-\frac{3.2}{7.11}\\=-\frac{6}{77}\)
10. \(\frac{-10}{17} . \left(\frac{-7}{3}\right)\\=+\frac{10.7}{17.3}\\=\frac{70}{51}\)
11. \(\frac{-7}{10} . \frac{4}{2}\\=-\frac{7}{10}.\frac{2}{1}\\=-\frac{7.2}{10.1}\\=-\frac{14}{10}\\=-\frac{7}{5}\)
12. \(\frac{-11}{-7} . \left(\frac{-8}{5}\right)\\=-\frac{11.8}{7.5}\\=-\frac{88}{35}\)