Breuken verm. (reeks 2)

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Vermenigvuldig de breuken

1. \(\frac{-6}{17} . \frac{6}{6}\)
2. \(\frac{-5}{-7} . \left(\frac{-7}{-11}\right)\)
3. \(\frac{7}{-17} . \left(\frac{8}{-2}\right)\)
4. \(\frac{11}{10} . \left(\frac{5}{-5}\right)\)
5. \(\frac{-6}{5} . \left(\frac{-2}{8}\right)\)
6. \(\frac{8}{19} . \left(\frac{-12}{-7}\right)\)
7. \(\frac{4}{13} . \frac{9}{6}\)
8. \(\frac{8}{11} . \left(\frac{-2}{-3}\right)\)
9. \(\frac{5}{3} . \frac{12}{12}\)
10. \(\frac{-8}{-13} . \left(\frac{11}{-8}\right)\)
11. \(\frac{-9}{19} . \left(\frac{12}{-10}\right)\)
12. \(\frac{11}{-15} . \left(\frac{9}{-4}\right)\)

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{-6}{17} . \frac{6}{6}\\=-\frac{6}{17}.\frac{1}{1}\\=-\frac{6.1}{17.1}\\=-\frac{6}{17}\)
2. \(\frac{-5}{-7} . \left(\frac{-7}{-11}\right)\\=+\frac{5.7}{7.11}\\=\frac{35}{77}\\=\frac{5}{11}\)
3. \(\frac{7}{-17} . \left(\frac{8}{-2}\right)\\=+\frac{7}{17}.\frac{4}{1}\\=+\frac{7.4}{17.1}\\=\frac{28}{17}\)
4. \(\frac{11}{10} . \left(\frac{5}{-5}\right)\\=-\frac{11}{10}.\frac{1}{1}\\=-\frac{11.1}{10.1}\\=-\frac{11}{10}\)
5. \(\frac{-6}{5} . \left(\frac{-2}{8}\right)\\=+\frac{6}{5}.\frac{1}{4}\\=+\frac{6.1}{5.4}\\=\frac{6}{20}\\=\frac{3}{10}\)
6. \(\frac{8}{19} . \left(\frac{-12}{-7}\right)\\=+\frac{8.12}{19.7}\\=\frac{96}{133}\)
7. \(\frac{4}{13} . \frac{9}{6}\\=+\frac{4}{13}.\frac{3}{2}\\=+\frac{4.3}{13.2}\\=\frac{12}{26}\\=\frac{6}{13}\)
8. \(\frac{8}{11} . \left(\frac{-2}{-3}\right)\\=+\frac{8.2}{11.3}\\=\frac{16}{33}\)
9. \(\frac{5}{3} . \frac{12}{12}\\=+\frac{5}{3}.\frac{1}{1}\\=+\frac{5.1}{3.1}\\=\frac{5}{3}\)
10. \(\frac{-8}{-13} . \left(\frac{11}{-8}\right)\\=-\frac{8.11}{13.8}\\=-\frac{88}{104}\\=-\frac{11}{13}\)
11. \(\frac{-9}{19} . \left(\frac{12}{-10}\right)\\=+\frac{9}{19}.\frac{6}{5}\\=+\frac{9.6}{19.5}\\=\frac{54}{95}\)
12. \(\frac{11}{-15} . \left(\frac{9}{-4}\right)\\=+\frac{11.9}{15.4}\\=\frac{99}{60}\\=\frac{33}{20}\)