Breuken verm. (reeks 2)

Hoofdmenu Eentje per keer  🖨

Vermenigvuldig de breuken

1. \(\frac{-7}{-16} . \left(\frac{-7}{5}\right)\)
2. \(\frac{-5}{-2} . \left(\frac{8}{-10}\right)\)
3. \(\frac{7}{15} . \frac{10}{9}\)
4. \(\frac{-3}{16} . \left(\frac{-11}{12}\right)\)
5. \(\frac{-10}{-17} . \left(\frac{-12}{3}\right)\)
6. \(\frac{-9}{-7} . \left(\frac{-2}{-10}\right)\)
7. \(\frac{-3}{7} . \left(\frac{5}{-7}\right)\)
8. \(\frac{5}{18} . \left(\frac{4}{-10}\right)\)
9. \(\frac{4}{3} . \left(\frac{-7}{6}\right)\)
10. \(\frac{-5}{4} . \left(\frac{-12}{-7}\right)\)
11. \(\frac{-10}{-9} . \left(\frac{-5}{-11}\right)\)
12. \(\frac{-5}{7} . \left(\frac{-10}{-4}\right)\)

---

Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{-7}{-16} . \left(\frac{-7}{5}\right)\\=-\frac{7.7}{16.5}\\=-\frac{49}{80}\)
2. \(\frac{-5}{-2} . \left(\frac{8}{-10}\right)\\=-\frac{5}{2}.\frac{4}{5}\\=-\frac{5.4}{2.5}\\=-\frac{20}{10}\\=-\frac{2}{1}= 2\)
3. \(\frac{7}{15} . \frac{10}{9}\\=+\frac{7.10}{15.9}\\=\frac{70}{135}\\=\frac{14}{27}\)
4. \(\frac{-3}{16} . \left(\frac{-11}{12}\right)\\=+\frac{3.11}{16.12}\\=\frac{33}{192}\\=\frac{11}{64}\)
5. \(\frac{-10}{-17} . \left(\frac{-12}{3}\right)\\=-\frac{10}{17}.\frac{4}{1}\\=-\frac{10.4}{17.1}\\=-\frac{40}{17}\)
6. \(\frac{-9}{-7} . \left(\frac{-2}{-10}\right)\\=+\frac{9}{7}.\frac{1}{5}\\=+\frac{9.1}{7.5}\\=\frac{9}{35}\)
7. \(\frac{-3}{7} . \left(\frac{5}{-7}\right)\\=+\frac{3.5}{7.7}\\=\frac{15}{49}\)
8. \(\frac{5}{18} . \left(\frac{4}{-10}\right)\\=-\frac{5}{18}.\frac{2}{5}\\=-\frac{5.2}{18.5}\\=-\frac{10}{90}\\=-\frac{1}{9}\)
9. \(\frac{4}{3} . \left(\frac{-7}{6}\right)\\=-\frac{4.7}{3.6}\\=-\frac{28}{18}\\=-\frac{14}{9}\)
10. \(\frac{-5}{4} . \left(\frac{-12}{-7}\right)\\=-\frac{5.12}{4.7}\\=-\frac{60}{28}\\=-\frac{15}{7}\)
11. \(\frac{-10}{-9} . \left(\frac{-5}{-11}\right)\\=+\frac{10.5}{9.11}\\=\frac{50}{99}\)
12. \(\frac{-5}{7} . \left(\frac{-10}{-4}\right)\\=-\frac{5}{7}.\frac{5}{2}\\=-\frac{5.5}{7.2}\\=-\frac{25}{14}\)