Breuken verm. (reeks 2)

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Vermenigvuldig de breuken

1. \(\frac{10}{3} . \left(\frac{-11}{-6}\right)\)
2. \(\frac{-8}{-5} . \left(\frac{12}{-7}\right)\)
3. \(\frac{-10}{-11} . \left(\frac{-7}{-2}\right)\)
4. \(\frac{-2}{3} . \left(\frac{-5}{12}\right)\)
5. \(\frac{-5}{19} . \left(\frac{9}{-9}\right)\)
6. \(\frac{-2}{-19} . \left(\frac{-12}{-6}\right)\)
7. \(\frac{-6}{-5} . \left(\frac{-5}{-6}\right)\)
8. \(\frac{10}{9} . \left(\frac{-9}{-12}\right)\)
9. \(\frac{7}{-4} . \left(\frac{-6}{6}\right)\)
10. \(\frac{6}{13} . \left(\frac{-3}{7}\right)\)
11. \(\frac{-3}{4} . \frac{10}{3}\)
12. \(\frac{-11}{-16} . \left(\frac{-2}{-7}\right)\)

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{10}{3} . \left(\frac{-11}{-6}\right)\\=+\frac{10.11}{3.6}\\=\frac{110}{18}\\=\frac{55}{9}\)
2. \(\frac{-8}{-5} . \left(\frac{12}{-7}\right)\\=-\frac{8.12}{5.7}\\=-\frac{96}{35}\)
3. \(\frac{-10}{-11} . \left(\frac{-7}{-2}\right)\\=+\frac{10.7}{11.2}\\=\frac{70}{22}\\=\frac{35}{11}\)
4. \(\frac{-2}{3} . \left(\frac{-5}{12}\right)\\=+\frac{2.5}{3.12}\\=\frac{10}{36}\\=\frac{5}{18}\)
5. \(\frac{-5}{19} . \left(\frac{9}{-9}\right)\\=+\frac{5}{19}.\frac{1}{1}\\=+\frac{5.1}{19.1}\\=\frac{5}{19}\)
6. \(\frac{-2}{-19} . \left(\frac{-12}{-6}\right)\\=+\frac{2}{19}.\frac{2}{1}\\=+\frac{2.2}{19.1}\\=\frac{4}{19}\)
7. \(\frac{-6}{-5} . \left(\frac{-5}{-6}\right)\\=+\frac{6.5}{5.6}\\=\frac{30}{30}\\=\frac{1}{1}= 1\)
8. \(\frac{10}{9} . \left(\frac{-9}{-12}\right)\\=+\frac{10}{9}.\frac{3}{4}\\=+\frac{10.3}{9.4}\\=\frac{30}{36}\\=\frac{5}{6}\)
9. \(\frac{7}{-4} . \left(\frac{-6}{6}\right)\\=+\frac{7}{4}.\frac{1}{1}\\=+\frac{7.1}{4.1}\\=\frac{7}{4}\)
10. \(\frac{6}{13} . \left(\frac{-3}{7}\right)\\=-\frac{6.3}{13.7}\\=-\frac{18}{91}\)
11. \(\frac{-3}{4} . \frac{10}{3}\\=-\frac{3.10}{4.3}\\=-\frac{30}{12}\\=-\frac{5}{2}\)
12. \(\frac{-11}{-16} . \left(\frac{-2}{-7}\right)\\=+\frac{11.2}{16.7}\\=\frac{22}{112}\\=\frac{11}{56}\)