Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{3}{5} . \frac{9}{11}\\=\frac{3.9}{5.11}\\=\frac{27}{55}\)
2. \(\frac{9}{4} . \frac{11}{6}\\=\frac{9.11}{4.6}\\=\frac{99}{24}\\=\frac{33}{8}\)
3. \(\frac{12}{8} . \frac{2}{11}\\=\frac{3}{2} . \frac{2}{11}\\=\frac{3.2}{2.11}\\=\frac{6}{22}\\=\frac{3}{11}\)
4. \(\frac{6}{3} . \frac{6}{12}\\=\frac{2}{1} . \frac{1}{2}\\=\frac{2.1}{1.2}\\=\frac{2}{2}\\=\frac{1}{1}= 1\)
5. \(\frac{12}{3} . \frac{12}{3}\\=\frac{4}{1} . \frac{4}{1}\\=\frac{4.4}{1.1}\\=\frac{16}{1}= 16\)
6. \(\frac{2}{10} . \frac{5}{4}\\=\frac{1}{5} . \frac{5}{4}\\=\frac{1.5}{5.4}\\=\frac{5}{20}\\=\frac{1}{4}\)
7. \(\frac{4}{11} . \frac{3}{9}\\=\frac{4}{11} . \frac{1}{3}\\=\frac{4.1}{11.3}\\=\frac{4}{33}\)
8. \(\frac{11}{4} . \frac{7}{7}\\=\frac{11}{4} . \frac{1}{1}\\=\frac{11.1}{4.1}\\=\frac{11}{4}\)
9. \(\frac{2}{5} . \frac{8}{11}\\=\frac{2.8}{5.11}\\=\frac{16}{55}\)
10. \(\frac{6}{5} . \frac{11}{7}\\=\frac{6.11}{5.7}\\=\frac{66}{35}\)
11. \(\frac{10}{7} . \frac{9}{4}\\=\frac{10.9}{7.4}\\=\frac{90}{28}\\=\frac{45}{14}\)
12. \(\frac{8}{2} . \frac{2}{8}\\=\frac{4}{1} . \frac{1}{4}\\=\frac{4.1}{1.4}\\=\frac{4}{4}\\=\frac{1}{1}= 1\)