Breuken verm. (reeks 2)

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Vermenigvuldig de breuken

1. \(\frac{10}{11} . \left(\frac{-4}{-6}\right)\)
2. \(\frac{10}{17} . \left(\frac{-2}{2}\right)\)
3. \(\frac{-9}{-8} . \frac{11}{3}\)
4. \(\frac{-3}{-16} . \left(\frac{2}{-10}\right)\)
5. \(\frac{-12}{17} . \frac{4}{4}\)
6. \(\frac{-3}{4} . \left(\frac{-2}{7}\right)\)
7. \(\frac{-5}{3} . \left(\frac{6}{-6}\right)\)
8. \(\frac{7}{-12} . \left(\frac{-9}{-12}\right)\)
9. \(\frac{12}{5} . \frac{8}{3}\)
10. \(\frac{12}{17} . \left(\frac{-10}{-7}\right)\)
11. \(\frac{-5}{-14} . \left(\frac{-2}{8}\right)\)
12. \(\frac{-12}{13} . \frac{8}{3}\)

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{10}{11} . \left(\frac{-4}{-6}\right)\\=+\frac{10}{11}.\frac{2}{3}\\=+\frac{10.2}{11.3}\\=\frac{20}{33}\)
2. \(\frac{10}{17} . \left(\frac{-2}{2}\right)\\=-\frac{10}{17}.\frac{1}{1}\\=-\frac{10.1}{17.1}\\=-\frac{10}{17}\)
3. \(\frac{-9}{-8} . \frac{11}{3}\\=+\frac{9.11}{8.3}\\=\frac{99}{24}\\=\frac{33}{8}\)
4. \(\frac{-3}{-16} . \left(\frac{2}{-10}\right)\\=-\frac{3}{16}.\frac{1}{5}\\=-\frac{3.1}{16.5}\\=-\frac{3}{80}\)
5. \(\frac{-12}{17} . \frac{4}{4}\\=-\frac{12}{17}.\frac{1}{1}\\=-\frac{12.1}{17.1}\\=-\frac{12}{17}\)
6. \(\frac{-3}{4} . \left(\frac{-2}{7}\right)\\=+\frac{3.2}{4.7}\\=\frac{6}{28}\\=\frac{3}{14}\)
7. \(\frac{-5}{3} . \left(\frac{6}{-6}\right)\\=+\frac{5}{3}.\frac{1}{1}\\=+\frac{5.1}{3.1}\\=\frac{5}{3}\)
8. \(\frac{7}{-12} . \left(\frac{-9}{-12}\right)\\=-\frac{7}{12}.\frac{3}{4}\\=-\frac{7.3}{12.4}\\=-\frac{21}{48}\\=-\frac{7}{16}\)
9. \(\frac{12}{5} . \frac{8}{3}\\=+\frac{12.8}{5.3}\\=\frac{96}{15}\\=\frac{32}{5}\)
10. \(\frac{12}{17} . \left(\frac{-10}{-7}\right)\\=+\frac{12.10}{17.7}\\=\frac{120}{119}\)
11. \(\frac{-5}{-14} . \left(\frac{-2}{8}\right)\\=-\frac{5}{14}.\frac{1}{4}\\=-\frac{5.1}{14.4}\\=-\frac{5}{56}\)
12. \(\frac{-12}{13} . \frac{8}{3}\\=-\frac{12.8}{13.3}\\=-\frac{96}{39}\\=-\frac{32}{13}\)