Breuken verm. (reeks 2)

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Vermenigvuldig de breuken

  1. \(\frac{2}{9} . \frac{9}{9}\)
  2. \(\frac{4}{-15} . \left(\frac{12}{-9}\right)\)
  3. \(\frac{-12}{19} . \left(\frac{-9}{7}\right)\)
  4. \(\frac{6}{-7} . \left(\frac{2}{-2}\right)\)
  5. \(\frac{-9}{10} . \left(\frac{-8}{-9}\right)\)
  6. \(\frac{2}{17} . \left(\frac{-5}{-10}\right)\)
  7. \(\frac{10}{-3} . \left(\frac{8}{-3}\right)\)
  8. \(\frac{-10}{-19} . \left(\frac{-7}{-11}\right)\)
  9. \(\frac{-7}{4} . \left(\frac{7}{-9}\right)\)
  10. \(\frac{11}{-16} . \left(\frac{-10}{-10}\right)\)
  11. \(\frac{6}{17} . \frac{4}{10}\)
  12. \(\frac{-8}{-7} . \left(\frac{-2}{-4}\right)\)

Vermenigvuldig de breuken

Verbetersleutel

  1. \(\frac{2}{9} . \frac{9}{9}\\=+\frac{2}{9}.\frac{1}{1}\\=+\frac{2.1}{9.1}\\=\frac{2}{9}\)
  2. \(\frac{4}{-15} . \left(\frac{12}{-9}\right)\\=+\frac{4}{15}.\frac{4}{3}\\=+\frac{4.4}{15.3}\\=\frac{16}{45}\)
  3. \(\frac{-12}{19} . \left(\frac{-9}{7}\right)\\=+\frac{12.9}{19.7}\\=\frac{108}{133}\)
  4. \(\frac{6}{-7} . \left(\frac{2}{-2}\right)\\=+\frac{6}{7}.\frac{1}{1}\\=+\frac{6.1}{7.1}\\=\frac{6}{7}\)
  5. \(\frac{-9}{10} . \left(\frac{-8}{-9}\right)\\=-\frac{9.8}{10.9}\\=-\frac{72}{90}\\=-\frac{4}{5}\)
  6. \(\frac{2}{17} . \left(\frac{-5}{-10}\right)\\=+\frac{2}{17}.\frac{1}{2}\\=+\frac{2.1}{17.2}\\=\frac{2}{34}\\=\frac{1}{17}\)
  7. \(\frac{10}{-3} . \left(\frac{8}{-3}\right)\\=+\frac{10.8}{3.3}\\=\frac{80}{9}\)
  8. \(\frac{-10}{-19} . \left(\frac{-7}{-11}\right)\\=+\frac{10.7}{19.11}\\=\frac{70}{209}\)
  9. \(\frac{-7}{4} . \left(\frac{7}{-9}\right)\\=+\frac{7.7}{4.9}\\=\frac{49}{36}\)
  10. \(\frac{11}{-16} . \left(\frac{-10}{-10}\right)\\=-\frac{11}{16}.\frac{1}{1}\\=-\frac{11.1}{16.1}\\=-\frac{11}{16}\)
  11. \(\frac{6}{17} . \frac{4}{10}\\=+\frac{6}{17}.\frac{2}{5}\\=+\frac{6.2}{17.5}\\=\frac{12}{85}\)
  12. \(\frac{-8}{-7} . \left(\frac{-2}{-4}\right)\\=+\frac{8}{7}.\frac{1}{2}\\=+\frac{8.1}{7.2}\\=\frac{8}{14}\\=\frac{4}{7}\)
Oefeningengenerator vanhoeckes.be/wiskunde 2021-12-02 01:18:40