Breuken verm. (reeks 2)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{-11}{3} . \left(\frac{-4}{10}\right)\\=+\frac{11}{3}.\frac{2}{5}\\=+\frac{11.2}{3.5}\\=\frac{22}{15}\)
2. \(\frac{2}{-3} . \frac{2}{12}\\=-\frac{2}{3}.\frac{1}{6}\\=-\frac{2.1}{3.6}\\=-\frac{2}{18}\\=-\frac{1}{9}\)
3. \(\frac{-6}{-17} . \left(\frac{-7}{-9}\right)\\=+\frac{6.7}{17.9}\\=\frac{42}{153}\\=\frac{14}{51}\)
4. \(\frac{6}{-5} . \left(\frac{2}{-10}\right)\\=+\frac{6}{5}.\frac{1}{5}\\=+\frac{6.1}{5.5}\\=\frac{6}{25}\)
5. \(\frac{-6}{-17} . \left(\frac{-7}{10}\right)\\=-\frac{6.7}{17.10}\\=-\frac{42}{170}\\=-\frac{21}{85}\)
6. \(\frac{-3}{-16} . \frac{7}{6}\\=+\frac{3.7}{16.6}\\=\frac{21}{96}\\=\frac{7}{32}\)
7. \(\frac{10}{17} . \left(\frac{6}{-2}\right)\\=-\frac{10}{17}.\frac{3}{1}\\=-\frac{10.3}{17.1}\\=-\frac{30}{17}\)
8. \(\frac{4}{-17} . \left(\frac{-3}{7}\right)\\=+\frac{4.3}{17.7}\\=\frac{12}{119}\)
9. \(\frac{4}{-17} . \left(\frac{-11}{7}\right)\\=+\frac{4.11}{17.7}\\=\frac{44}{119}\)
10. \(\frac{-4}{13} . \left(\frac{-7}{-4}\right)\\=-\frac{4.7}{13.4}\\=-\frac{28}{52}\\=-\frac{7}{13}\)
11. \(\frac{5}{-2} . \left(\frac{-12}{5}\right)\\=+\frac{5.12}{2.5}\\=\frac{60}{10}\\=\frac{6}{1}= 6\)
12. \(\frac{-4}{-17} . \left(\frac{-9}{-12}\right)\\=+\frac{4}{17}.\frac{3}{4}\\=+\frac{4.3}{17.4}\\=\frac{12}{68}\\=\frac{3}{17}\)