Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{10}{8} . \frac{4}{11}\\=\frac{5}{4} . \frac{4}{11}\\=\frac{5.4}{4.11}\\=\frac{20}{44}\\=\frac{5}{11}\)
2. \(\frac{6}{11} . \frac{4}{9}\\=\frac{6.4}{11.9}\\=\frac{24}{99}\\=\frac{8}{33}\)
3. \(\frac{8}{4} . \frac{12}{7}\\=\frac{2}{1} . \frac{12}{7}\\=\frac{2.12}{1.7}\\=\frac{24}{7}\)
4. \(\frac{12}{5} . \frac{10}{4}\\=\frac{12}{5} . \frac{5}{2}\\=\frac{12.5}{5.2}\\=\frac{60}{10}\\=\frac{6}{1}= 6\)
5. \(\frac{10}{11} . \frac{3}{3}\\=\frac{10}{11} . \frac{1}{1}\\=\frac{10.1}{11.1}\\=\frac{10}{11}\)
6. \(\frac{2}{7} . \frac{2}{10}\\=\frac{2}{7} . \frac{1}{5}\\=\frac{2.1}{7.5}\\=\frac{2}{35}\)
7. \(\frac{10}{12} . \frac{2}{12}\\=\frac{5}{6} . \frac{1}{6}\\=\frac{5.1}{6.6}\\=\frac{5}{36}\)
8. \(\frac{12}{8} . \frac{6}{2}\\=\frac{3}{2} . \frac{3}{1}\\=\frac{3.3}{2.1}\\=\frac{9}{2}\)
9. \(\frac{10}{7} . \frac{4}{6}\\=\frac{10}{7} . \frac{2}{3}\\=\frac{10.2}{7.3}\\=\frac{20}{21}\)
10. \(\frac{11}{12} . \frac{5}{9}\\=\frac{11.5}{12.9}\\=\frac{55}{108}\)
11. \(\frac{6}{6} . \frac{11}{9}\\=\frac{1}{1} . \frac{11}{9}\\=\frac{1.11}{1.9}\\=\frac{11}{9}\)
12. \(\frac{10}{3} . \frac{3}{6}\\=\frac{10}{3} . \frac{1}{2}\\=\frac{10.1}{3.2}\\=\frac{10}{6}\\=\frac{5}{3}\)