Breuken verm. (reeks 2)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{-11}{-15} . \left(\frac{-7}{-2}\right)\\=+\frac{11.7}{15.2}\\=\frac{77}{30}\)
2. \(\frac{11}{-5} . \frac{10}{3}\\=-\frac{11.10}{5.3}\\=-\frac{110}{15}\\=-\frac{22}{3}\)
3. \(\frac{-5}{19} . \left(\frac{-6}{-7}\right)\\=-\frac{5.6}{19.7}\\=-\frac{30}{133}\)
4. \(\frac{10}{17} . \left(\frac{-3}{-9}\right)\\=+\frac{10}{17}.\frac{1}{3}\\=+\frac{10.1}{17.3}\\=\frac{10}{51}\)
5. \(\frac{10}{17} . \frac{11}{6}\\=+\frac{10.11}{17.6}\\=\frac{110}{102}\\=\frac{55}{51}\)
6. \(\frac{-10}{-3} . \left(\frac{-10}{12}\right)\\=-\frac{10}{3}.\frac{5}{6}\\=-\frac{10.5}{3.6}\\=-\frac{50}{18}\\=-\frac{25}{9}\)
7. \(\frac{-7}{12} . \frac{3}{5}\\=-\frac{7.3}{12.5}\\=-\frac{21}{60}\\=-\frac{7}{20}\)
8. \(\frac{6}{-5} . \frac{3}{4}\\=-\frac{6.3}{5.4}\\=-\frac{18}{20}\\=-\frac{9}{10}\)
9. \(\frac{-10}{-17} . \left(\frac{-6}{9}\right)\\=-\frac{10}{17}.\frac{2}{3}\\=-\frac{10.2}{17.3}\\=-\frac{20}{51}\)
10. \(\frac{12}{11} . \left(\frac{4}{-10}\right)\\=-\frac{12}{11}.\frac{2}{5}\\=-\frac{12.2}{11.5}\\=-\frac{24}{55}\)
11. \(\frac{4}{-5} . \left(\frac{-6}{9}\right)\\=+\frac{4}{5}.\frac{2}{3}\\=+\frac{4.2}{5.3}\\=\frac{8}{15}\)
12. \(\frac{-4}{19} . \left(\frac{9}{-3}\right)\\=+\frac{4}{19}.\frac{3}{1}\\=+\frac{4.3}{19.1}\\=\frac{12}{19}\)