Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{4}{2} . \frac{6}{5}\\=\frac{2}{1} . \frac{6}{5}\\=\frac{2.6}{1.5}\\=\frac{12}{5}\)
2. \(\frac{5}{3} . \frac{3}{8}\\=\frac{5.3}{3.8}\\=\frac{15}{24}\\=\frac{5}{8}\)
3. \(\frac{4}{12} . \frac{12}{5}\\=\frac{1}{3} . \frac{12}{5}\\=\frac{1.12}{3.5}\\=\frac{12}{15}\\=\frac{4}{5}\)
4. \(\frac{11}{8} . \frac{3}{11}\\=\frac{11.3}{8.11}\\=\frac{33}{88}\\=\frac{3}{8}\)
5. \(\frac{12}{4} . \frac{8}{7}\\=\frac{3}{1} . \frac{8}{7}\\=\frac{3.8}{1.7}\\=\frac{24}{7}\)
6. \(\frac{2}{4} . \frac{4}{11}\\=\frac{1}{2} . \frac{4}{11}\\=\frac{1.4}{2.11}\\=\frac{4}{22}\\=\frac{2}{11}\)
7. \(\frac{10}{5} . \frac{12}{9}\\=\frac{2}{1} . \frac{4}{3}\\=\frac{2.4}{1.3}\\=\frac{8}{3}\)
8. \(\frac{10}{2} . \frac{2}{7}\\=\frac{5}{1} . \frac{2}{7}\\=\frac{5.2}{1.7}\\=\frac{10}{7}\)
9. \(\frac{8}{4} . \frac{7}{8}\\=\frac{2}{1} . \frac{7}{8}\\=\frac{2.7}{1.8}\\=\frac{14}{8}\\=\frac{7}{4}\)
10. \(\frac{11}{10} . \frac{12}{10}\\=\frac{11}{10} . \frac{6}{5}\\=\frac{11.6}{10.5}\\=\frac{66}{50}\\=\frac{33}{25}\)
11. \(\frac{8}{7} . \frac{5}{7}\\=\frac{8.5}{7.7}\\=\frac{40}{49}\)
12. \(\frac{10}{2} . \frac{3}{10}\\=\frac{5}{1} . \frac{3}{10}\\=\frac{5.3}{1.10}\\=\frac{15}{10}\\=\frac{3}{2}\)