Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{7}{11} . \frac{6}{8}\\=\frac{7}{11} . \frac{3}{4}\\=\frac{7.3}{11.4}\\=\frac{21}{44}\)
2. \(\frac{6}{7} . \frac{10}{10}\\=\frac{6}{7} . \frac{1}{1}\\=\frac{6.1}{7.1}\\=\frac{6}{7}\)
3. \(\frac{12}{12} . \frac{8}{9}\\=\frac{1}{1} . \frac{8}{9}\\=\frac{1.8}{1.9}\\=\frac{8}{9}\)
4. \(\frac{5}{11} . \frac{8}{3}\\=\frac{5.8}{11.3}\\=\frac{40}{33}\)
5. \(\frac{6}{2} . \frac{7}{8}\\=\frac{3}{1} . \frac{7}{8}\\=\frac{3.7}{1.8}\\=\frac{21}{8}\)
6. \(\frac{9}{4} . \frac{7}{11}\\=\frac{9.7}{4.11}\\=\frac{63}{44}\)
7. \(\frac{8}{10} . \frac{4}{8}\\=\frac{4}{5} . \frac{1}{2}\\=\frac{4.1}{5.2}\\=\frac{4}{10}\\=\frac{2}{5}\)
8. \(\frac{8}{2} . \frac{7}{8}\\=\frac{4}{1} . \frac{7}{8}\\=\frac{4.7}{1.8}\\=\frac{28}{8}\\=\frac{7}{2}\)
9. \(\frac{9}{5} . \frac{9}{7}\\=\frac{9.9}{5.7}\\=\frac{81}{35}\)
10. \(\frac{9}{5} . \frac{3}{8}\\=\frac{9.3}{5.8}\\=\frac{27}{40}\)
11. \(\frac{9}{9} . \frac{12}{4}\\=\frac{1}{1} . \frac{3}{1}\\=\frac{1.3}{1.1}\\=\frac{3}{1}= 3\)
12. \(\frac{6}{2} . \frac{11}{10}\\=\frac{3}{1} . \frac{11}{10}\\=\frac{3.11}{1.10}\\=\frac{33}{10}\)