Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{5}{7} . \frac{12}{4}\\=\frac{5}{7} . \frac{3}{1}\\=\frac{5.3}{7.1}\\=\frac{15}{7}\)
2. \(\frac{11}{4} . \frac{8}{9}\\=\frac{11.8}{4.9}\\=\frac{88}{36}\\=\frac{22}{9}\)
3. \(\frac{2}{2} . \frac{12}{9}\\=\frac{1}{1} . \frac{4}{3}\\=\frac{1.4}{1.3}\\=\frac{4}{3}\)
4. \(\frac{12}{11} . \frac{4}{6}\\=\frac{12}{11} . \frac{2}{3}\\=\frac{12.2}{11.3}\\=\frac{24}{33}\\=\frac{8}{11}\)
5. \(\frac{4}{10} . \frac{10}{4}\\=\frac{2}{5} . \frac{5}{2}\\=\frac{2.5}{5.2}\\=\frac{10}{10}\\=\frac{1}{1}= 1\)
6. \(\frac{7}{10} . \frac{4}{4}\\=\frac{7}{10} . \frac{1}{1}\\=\frac{7.1}{10.1}\\=\frac{7}{10}\)
7. \(\frac{12}{12} . \frac{2}{4}\\=\frac{1}{1} . \frac{1}{2}\\=\frac{1.1}{1.2}\\=\frac{1}{2}\)
8. \(\frac{8}{2} . \frac{10}{7}\\=\frac{4}{1} . \frac{10}{7}\\=\frac{4.10}{1.7}\\=\frac{40}{7}\)
9. \(\frac{5}{4} . \frac{2}{3}\\=\frac{5.2}{4.3}\\=\frac{10}{12}\\=\frac{5}{6}\)
10. \(\frac{5}{7} . \frac{8}{10}\\=\frac{5}{7} . \frac{4}{5}\\=\frac{5.4}{7.5}\\=\frac{20}{35}\\=\frac{4}{7}\)
11. \(\frac{3}{5} . \frac{12}{6}\\=\frac{3}{5} . \frac{2}{1}\\=\frac{3.2}{5.1}\\=\frac{6}{5}\)
12. \(\frac{8}{10} . \frac{11}{11}\\=\frac{4}{5} . \frac{1}{1}\\=\frac{4.1}{5.1}\\=\frac{4}{5}\)