Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{11}{2} . \frac{11}{9}\\=\frac{11.11}{2.9}\\=\frac{121}{18}\)
2. \(\frac{5}{8} . \frac{12}{2}\\=\frac{5}{8} . \frac{6}{1}\\=\frac{5.6}{8.1}\\=\frac{30}{8}\\=\frac{15}{4}\)
3. \(\frac{8}{2} . \frac{12}{11}\\=\frac{4}{1} . \frac{12}{11}\\=\frac{4.12}{1.11}\\=\frac{48}{11}\)
4. \(\frac{9}{3} . \frac{8}{5}\\=\frac{3}{1} . \frac{8}{5}\\=\frac{3.8}{1.5}\\=\frac{24}{5}\)
5. \(\frac{5}{7} . \frac{11}{3}\\=\frac{5.11}{7.3}\\=\frac{55}{21}\)
6. \(\frac{8}{6} . \frac{12}{11}\\=\frac{4}{3} . \frac{12}{11}\\=\frac{4.12}{3.11}\\=\frac{48}{33}\\=\frac{16}{11}\)
7. \(\frac{2}{6} . \frac{7}{4}\\=\frac{1}{3} . \frac{7}{4}\\=\frac{1.7}{3.4}\\=\frac{7}{12}\)
8. \(\frac{4}{2} . \frac{3}{3}\\=\frac{2}{1} . \frac{1}{1}\\=\frac{2.1}{1.1}\\=\frac{2}{1}= 2\)
9. \(\frac{11}{9} . \frac{2}{6}\\=\frac{11}{9} . \frac{1}{3}\\=\frac{11.1}{9.3}\\=\frac{11}{27}\)
10. \(\frac{4}{8} . \frac{9}{12}\\=\frac{1}{2} . \frac{3}{4}\\=\frac{1.3}{2.4}\\=\frac{3}{8}\)
11. \(\frac{9}{2} . \frac{3}{9}\\=\frac{9}{2} . \frac{1}{3}\\=\frac{9.1}{2.3}\\=\frac{9}{6}\\=\frac{3}{2}\)
12. \(\frac{10}{10} . \frac{6}{2}\\=\frac{1}{1} . \frac{3}{1}\\=\frac{1.3}{1.1}\\=\frac{3}{1}= 3\)