Breuken verm. (reeks 2)

Hoofdmenu Eentje per keer  🖨

Vermenigvuldig de breuken

1. \(\frac{-6}{-19} . \left(\frac{-11}{-7}\right)\)
2. \(\frac{-3}{2} . \left(\frac{-6}{-8}\right)\)
3. \(\frac{4}{-9} . \left(\frac{-6}{-9}\right)\)
4. \(\frac{-5}{13} . \left(\frac{-12}{-7}\right)\)
5. \(\frac{-9}{-19} . \left(\frac{9}{-7}\right)\)
6. \(\frac{-9}{4} . \left(\frac{2}{-5}\right)\)
7. \(\frac{-8}{-15} . \left(\frac{8}{-2}\right)\)
8. \(\frac{8}{-17} . \left(\frac{-11}{9}\right)\)
9. \(\frac{12}{7} . \left(\frac{-10}{3}\right)\)
10. \(\frac{-2}{7} . \left(\frac{-5}{-2}\right)\)
11. \(\frac{-6}{-5} . \left(\frac{5}{-7}\right)\)
12. \(\frac{-8}{9} . \left(\frac{-8}{-12}\right)\)

---

Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{-6}{-19} . \left(\frac{-11}{-7}\right)\\=+\frac{6.11}{19.7}\\=\frac{66}{133}\)
2. \(\frac{-3}{2} . \left(\frac{-6}{-8}\right)\\=-\frac{3}{2}.\frac{3}{4}\\=-\frac{3.3}{2.4}\\=-\frac{9}{8}\)
3. \(\frac{4}{-9} . \left(\frac{-6}{-9}\right)\\=-\frac{4}{9}.\frac{2}{3}\\=-\frac{4.2}{9.3}\\=-\frac{8}{27}\)
4. \(\frac{-5}{13} . \left(\frac{-12}{-7}\right)\\=-\frac{5.12}{13.7}\\=-\frac{60}{91}\)
5. \(\frac{-9}{-19} . \left(\frac{9}{-7}\right)\\=-\frac{9.9}{19.7}\\=-\frac{81}{133}\)
6. \(\frac{-9}{4} . \left(\frac{2}{-5}\right)\\=+\frac{9.2}{4.5}\\=\frac{18}{20}\\=\frac{9}{10}\)
7. \(\frac{-8}{-15} . \left(\frac{8}{-2}\right)\\=-\frac{8}{15}.\frac{4}{1}\\=-\frac{8.4}{15.1}\\=-\frac{32}{15}\)
8. \(\frac{8}{-17} . \left(\frac{-11}{9}\right)\\=+\frac{8.11}{17.9}\\=\frac{88}{153}\)
9. \(\frac{12}{7} . \left(\frac{-10}{3}\right)\\=-\frac{12.10}{7.3}\\=-\frac{120}{21}\\=-\frac{40}{7}\)
10. \(\frac{-2}{7} . \left(\frac{-5}{-2}\right)\\=-\frac{2.5}{7.2}\\=-\frac{10}{14}\\=-\frac{5}{7}\)
11. \(\frac{-6}{-5} . \left(\frac{5}{-7}\right)\\=-\frac{6.5}{5.7}\\=-\frac{30}{35}\\=-\frac{6}{7}\)
12. \(\frac{-8}{9} . \left(\frac{-8}{-12}\right)\\=-\frac{8}{9}.\frac{2}{3}\\=-\frac{8.2}{9.3}\\=-\frac{16}{27}\)