Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{7}{4} . \frac{6}{10}\\=\frac{7}{4} . \frac{3}{5}\\=\frac{7.3}{4.5}\\=\frac{21}{20}\)
2. \(\frac{4}{12} . \frac{5}{3}\\=\frac{1}{3} . \frac{5}{3}\\=\frac{1.5}{3.3}\\=\frac{5}{9}\)
3. \(\frac{3}{4} . \frac{2}{6}\\=\frac{3}{4} . \frac{1}{3}\\=\frac{3.1}{4.3}\\=\frac{3}{12}\\=\frac{1}{4}\)
4. \(\frac{10}{7} . \frac{2}{4}\\=\frac{10}{7} . \frac{1}{2}\\=\frac{10.1}{7.2}\\=\frac{10}{14}\\=\frac{5}{7}\)
5. \(\frac{6}{4} . \frac{8}{3}\\=\frac{3}{2} . \frac{8}{3}\\=\frac{3.8}{2.3}\\=\frac{24}{6}\\=\frac{4}{1}= 4\)
6. \(\frac{5}{5} . \frac{5}{4}\\=\frac{1}{1} . \frac{5}{4}\\=\frac{1.5}{1.4}\\=\frac{5}{4}\)
7. \(\frac{6}{2} . \frac{4}{11}\\=\frac{3}{1} . \frac{4}{11}\\=\frac{3.4}{1.11}\\=\frac{12}{11}\)
8. \(\frac{11}{7} . \frac{9}{9}\\=\frac{11}{7} . \frac{1}{1}\\=\frac{11.1}{7.1}\\=\frac{11}{7}\)
9. \(\frac{7}{3} . \frac{11}{9}\\=\frac{7.11}{3.9}\\=\frac{77}{27}\)
10. \(\frac{9}{10} . \frac{12}{9}\\=\frac{9}{10} . \frac{4}{3}\\=\frac{9.4}{10.3}\\=\frac{36}{30}\\=\frac{6}{5}\)
11. \(\frac{5}{2} . \frac{10}{5}\\=\frac{5}{2} . \frac{2}{1}\\=\frac{5.2}{2.1}\\=\frac{10}{2}\\=\frac{5}{1}= 5\)
12. \(\frac{5}{4} . \frac{3}{12}\\=\frac{5}{4} . \frac{1}{4}\\=\frac{5.1}{4.4}\\=\frac{5}{16}\)