Breuken verm. (reeks 2)

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Vermenigvuldig de breuken

1. \(\frac{11}{-6} . \left(\frac{-8}{10}\right)\)
2. \(\frac{-7}{-5} . \frac{12}{3}\)
3. \(\frac{4}{5} . \left(\frac{5}{-8}\right)\)
4. \(\frac{7}{-19} . \frac{11}{9}\)
5. \(\frac{-5}{18} . \left(\frac{-11}{-12}\right)\)
6. \(\frac{7}{-18} . \left(\frac{10}{-6}\right)\)
7. \(\frac{5}{-13} . \left(\frac{-11}{2}\right)\)
8. \(\frac{3}{7} . \left(\frac{-4}{-5}\right)\)
9. \(\frac{3}{-19} . \frac{2}{4}\)
10. \(\frac{-3}{7} . \left(\frac{-7}{2}\right)\)
11. \(\frac{3}{11} . \frac{5}{9}\)
12. \(\frac{5}{7} . \left(\frac{-6}{2}\right)\)

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{11}{-6} . \left(\frac{-8}{10}\right)\\=+\frac{11}{6}.\frac{4}{5}\\=+\frac{11.4}{6.5}\\=\frac{44}{30}\\=\frac{22}{15}\)
2. \(\frac{-7}{-5} . \frac{12}{3}\\=+\frac{7}{5}.\frac{4}{1}\\=+\frac{7.4}{5.1}\\=\frac{28}{5}\)
3. \(\frac{4}{5} . \left(\frac{5}{-8}\right)\\=-\frac{4.5}{5.8}\\=-\frac{20}{40}\\=-\frac{1}{2}\)
4. \(\frac{7}{-19} . \frac{11}{9}\\=-\frac{7.11}{19.9}\\=-\frac{77}{171}\)
5. \(\frac{-5}{18} . \left(\frac{-11}{-12}\right)\\=-\frac{5.11}{18.12}\\=-\frac{55}{216}\)
6. \(\frac{7}{-18} . \left(\frac{10}{-6}\right)\\=+\frac{7}{18}.\frac{5}{3}\\=+\frac{7.5}{18.3}\\=\frac{35}{54}\)
7. \(\frac{5}{-13} . \left(\frac{-11}{2}\right)\\=+\frac{5.11}{13.2}\\=\frac{55}{26}\)
8. \(\frac{3}{7} . \left(\frac{-4}{-5}\right)\\=+\frac{3.4}{7.5}\\=\frac{12}{35}\)
9. \(\frac{3}{-19} . \frac{2}{4}\\=-\frac{3}{19}.\frac{1}{2}\\=-\frac{3.1}{19.2}\\=-\frac{3}{38}\)
10. \(\frac{-3}{7} . \left(\frac{-7}{2}\right)\\=+\frac{3.7}{7.2}\\=\frac{21}{14}\\=\frac{3}{2}\)
11. \(\frac{3}{11} . \frac{5}{9}\\=+\frac{3.5}{11.9}\\=\frac{15}{99}\\=\frac{5}{33}\)
12. \(\frac{5}{7} . \left(\frac{-6}{2}\right)\\=-\frac{5}{7}.\frac{3}{1}\\=-\frac{5.3}{7.1}\\=-\frac{15}{7}\)