Breuken verm. (reeks 2)

Hoofdmenu Eentje per keer  🖨

Vermenigvuldig de breuken

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

---

Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{-12}{-17} . \frac{7}{4}\\=+\frac{12.7}{17.4}\\=\frac{84}{68}\\=\frac{21}{17}\)
2. \(\frac{10}{11} . \frac{12}{7}\\=+\frac{10.12}{11.7}\\=\frac{120}{77}\)
3. \(\frac{-6}{-19} . \left(\frac{-6}{-4}\right)\\=+\frac{6}{19}.\frac{3}{2}\\=+\frac{6.3}{19.2}\\=\frac{18}{38}\\=\frac{9}{19}\)
4. \(\frac{-2}{15} . \left(\frac{-2}{-8}\right)\\=-\frac{2}{15}.\frac{1}{4}\\=-\frac{2.1}{15.4}\\=-\frac{2}{60}\\=-\frac{1}{30}\)
5. \(\frac{5}{11} . \frac{9}{8}\\=+\frac{5.9}{11.8}\\=\frac{45}{88}\)
6. \(\frac{6}{11} . \left(\frac{-7}{-3}\right)\\=+\frac{6.7}{11.3}\\=\frac{42}{33}\\=\frac{14}{11}\)
7. \(\frac{-12}{13} . \left(\frac{-12}{-9}\right)\\=-\frac{12}{13}.\frac{4}{3}\\=-\frac{12.4}{13.3}\\=-\frac{48}{39}\\=-\frac{16}{13}\)
8. \(\frac{2}{-19} . \left(\frac{5}{-10}\right)\\=+\frac{2}{19}.\frac{1}{2}\\=+\frac{2.1}{19.2}\\=\frac{2}{38}\\=\frac{1}{19}\)
9. \(\frac{-6}{-17} . \left(\frac{-12}{-9}\right)\\=+\frac{6}{17}.\frac{4}{3}\\=+\frac{6.4}{17.3}\\=\frac{24}{51}\\=\frac{8}{17}\)
10. \(\frac{10}{7} . \left(\frac{-10}{12}\right)\\=-\frac{10}{7}.\frac{5}{6}\\=-\frac{10.5}{7.6}\\=-\frac{50}{42}\\=-\frac{25}{21}\)
11. \(\frac{12}{-17} . \frac{2}{8}\\=-\frac{12}{17}.\frac{1}{4}\\=-\frac{12.1}{17.4}\\=-\frac{12}{68}\\=-\frac{3}{17}\)
12. \(\frac{12}{5} . \frac{4}{5}\\=+\frac{12.4}{5.5}\\=\frac{48}{25}\)