Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{5}{5} . \frac{8}{7}\\=\frac{1}{1} . \frac{8}{7}\\=\frac{1.8}{1.7}\\=\frac{8}{7}\)
2. \(\frac{12}{11} . \frac{2}{2}\\=\frac{12}{11} . \frac{1}{1}\\=\frac{12.1}{11.1}\\=\frac{12}{11}\)
3. \(\frac{5}{11} . \frac{9}{3}\\=\frac{5}{11} . \frac{3}{1}\\=\frac{5.3}{11.1}\\=\frac{15}{11}\)
4. \(\frac{12}{4} . \frac{3}{6}\\=\frac{3}{1} . \frac{1}{2}\\=\frac{3.1}{1.2}\\=\frac{3}{2}\)
5. \(\frac{5}{10} . \frac{9}{8}\\=\frac{1}{2} . \frac{9}{8}\\=\frac{1.9}{2.8}\\=\frac{9}{16}\)
6. \(\frac{9}{3} . \frac{2}{3}\\=\frac{3}{1} . \frac{2}{3}\\=\frac{3.2}{1.3}\\=\frac{6}{3}\\=\frac{2}{1}= 2\)
7. \(\frac{2}{5} . \frac{11}{8}\\=\frac{2.11}{5.8}\\=\frac{22}{40}\\=\frac{11}{20}\)
8. \(\frac{10}{11} . \frac{2}{7}\\=\frac{10.2}{11.7}\\=\frac{20}{77}\)
9. \(\frac{11}{6} . \frac{8}{2}\\=\frac{11}{6} . \frac{4}{1}\\=\frac{11.4}{6.1}\\=\frac{44}{6}\\=\frac{22}{3}\)
10. \(\frac{4}{9} . \frac{3}{6}\\=\frac{4}{9} . \frac{1}{2}\\=\frac{4.1}{9.2}\\=\frac{4}{18}\\=\frac{2}{9}\)
11. \(\frac{8}{3} . \frac{6}{3}\\=\frac{8}{3} . \frac{2}{1}\\=\frac{8.2}{3.1}\\=\frac{16}{3}\)
12. \(\frac{3}{4} . \frac{4}{4}\\=\frac{3}{4} . \frac{1}{1}\\=\frac{3.1}{4.1}\\=\frac{3}{4}\)