Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{12}{9} . \frac{7}{4}\\=\frac{4}{3} . \frac{7}{4}\\=\frac{4.7}{3.4}\\=\frac{28}{12}\\=\frac{7}{3}\)
2. \(\frac{11}{6} . \frac{12}{5}\\=\frac{11.12}{6.5}\\=\frac{132}{30}\\=\frac{22}{5}\)
3. \(\frac{9}{3} . \frac{8}{9}\\=\frac{3}{1} . \frac{8}{9}\\=\frac{3.8}{1.9}\\=\frac{24}{9}\\=\frac{8}{3}\)
4. \(\frac{6}{3} . \frac{6}{3}\\=\frac{2}{1} . \frac{2}{1}\\=\frac{2.2}{1.1}\\=\frac{4}{1}= 4\)
5. \(\frac{6}{2} . \frac{10}{6}\\=\frac{3}{1} . \frac{5}{3}\\=\frac{3.5}{1.3}\\=\frac{15}{3}\\=\frac{5}{1}= 5\)
6. \(\frac{5}{6} . \frac{4}{11}\\=\frac{5.4}{6.11}\\=\frac{20}{66}\\=\frac{10}{33}\)
7. \(\frac{3}{4} . \frac{8}{5}\\=\frac{3.8}{4.5}\\=\frac{24}{20}\\=\frac{6}{5}\)
8. \(\frac{8}{7} . \frac{11}{4}\\=\frac{8.11}{7.4}\\=\frac{88}{28}\\=\frac{22}{7}\)
9. \(\frac{12}{4} . \frac{11}{5}\\=\frac{3}{1} . \frac{11}{5}\\=\frac{3.11}{1.5}\\=\frac{33}{5}\)
10. \(\frac{5}{7} . \frac{3}{12}\\=\frac{5}{7} . \frac{1}{4}\\=\frac{5.1}{7.4}\\=\frac{5}{28}\)
11. \(\frac{9}{12} . \frac{9}{8}\\=\frac{3}{4} . \frac{9}{8}\\=\frac{3.9}{4.8}\\=\frac{27}{32}\)
12. \(\frac{3}{6} . \frac{8}{4}\\=\frac{1}{2} . \frac{2}{1}\\=\frac{1.2}{2.1}\\=\frac{2}{2}\\=\frac{1}{1}= 1\)