Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

1. \(\frac{10}{3} . \frac{10}{3}\)
2. \(\frac{6}{10} . \frac{7}{5}\)
3. \(\frac{12}{9} . \frac{5}{9}\)
4. \(\frac{10}{9} . \frac{10}{8}\)
5. \(\frac{2}{11} . \frac{5}{2}\)
6. \(\frac{4}{4} . \frac{11}{4}\)
7. \(\frac{8}{7} . \frac{4}{3}\)
8. \(\frac{11}{6} . \frac{5}{12}\)
9. \(\frac{10}{5} . \frac{8}{12}\)
10. \(\frac{10}{3} . \frac{10}{10}\)
11. \(\frac{12}{12} . \frac{3}{11}\)
12. \(\frac{11}{5} . \frac{9}{3}\)

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{10}{3} . \frac{10}{3}\\=\frac{10.10}{3.3}\\=\frac{100}{9}\)
2. \(\frac{6}{10} . \frac{7}{5}\\=\frac{3}{5} . \frac{7}{5}\\=\frac{3.7}{5.5}\\=\frac{21}{25}\)
3. \(\frac{12}{9} . \frac{5}{9}\\=\frac{4}{3} . \frac{5}{9}\\=\frac{4.5}{3.9}\\=\frac{20}{27}\)
4. \(\frac{10}{9} . \frac{10}{8}\\=\frac{10}{9} . \frac{5}{4}\\=\frac{10.5}{9.4}\\=\frac{50}{36}\\=\frac{25}{18}\)
5. \(\frac{2}{11} . \frac{5}{2}\\=\frac{2.5}{11.2}\\=\frac{10}{22}\\=\frac{5}{11}\)
6. \(\frac{4}{4} . \frac{11}{4}\\=\frac{1}{1} . \frac{11}{4}\\=\frac{1.11}{1.4}\\=\frac{11}{4}\)
7. \(\frac{8}{7} . \frac{4}{3}\\=\frac{8.4}{7.3}\\=\frac{32}{21}\)
8. \(\frac{11}{6} . \frac{5}{12}\\=\frac{11.5}{6.12}\\=\frac{55}{72}\)
9. \(\frac{10}{5} . \frac{8}{12}\\=\frac{2}{1} . \frac{2}{3}\\=\frac{2.2}{1.3}\\=\frac{4}{3}\)
10. \(\frac{10}{3} . \frac{10}{10}\\=\frac{10}{3} . \frac{1}{1}\\=\frac{10.1}{3.1}\\=\frac{10}{3}\)
11. \(\frac{12}{12} . \frac{3}{11}\\=\frac{1}{1} . \frac{3}{11}\\=\frac{1.3}{1.11}\\=\frac{3}{11}\)
12. \(\frac{11}{5} . \frac{9}{3}\\=\frac{11}{5} . \frac{3}{1}\\=\frac{11.3}{5.1}\\=\frac{33}{5}\)