Breuken verm. (reeks 1)

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Vermenigvuldig de breuken

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

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Vermenigvuldig de breuken

Verbetersleutel

1. \(\frac{11}{2} . \frac{6}{5}\\=\frac{11.6}{2.5}\\=\frac{66}{10}\\=\frac{33}{5}\)
2. \(\frac{12}{6} . \frac{9}{9}\\=\frac{2}{1} . \frac{1}{1}\\=\frac{2.1}{1.1}\\=\frac{2}{1}= 2\)
3. \(\frac{12}{3} . \frac{12}{5}\\=\frac{4}{1} . \frac{12}{5}\\=\frac{4.12}{1.5}\\=\frac{48}{5}\)
4. \(\frac{5}{8} . \frac{5}{8}\\=\frac{5.5}{8.8}\\=\frac{25}{64}\)
5. \(\frac{12}{11} . \frac{7}{10}\\=\frac{12.7}{11.10}\\=\frac{84}{110}\\=\frac{42}{55}\)
6. \(\frac{10}{9} . \frac{4}{5}\\=\frac{10.4}{9.5}\\=\frac{40}{45}\\=\frac{8}{9}\)
7. \(\frac{11}{8} . \frac{7}{11}\\=\frac{11.7}{8.11}\\=\frac{77}{88}\\=\frac{7}{8}\)
8. \(\frac{3}{12} . \frac{4}{10}\\=\frac{1}{4} . \frac{2}{5}\\=\frac{1.2}{4.5}\\=\frac{2}{20}\\=\frac{1}{10}\)
9. \(\frac{4}{12} . \frac{2}{5}\\=\frac{1}{3} . \frac{2}{5}\\=\frac{1.2}{3.5}\\=\frac{2}{15}\)
10. \(\frac{12}{2} . \frac{7}{5}\\=\frac{6}{1} . \frac{7}{5}\\=\frac{6.7}{1.5}\\=\frac{42}{5}\)
11. \(\frac{3}{8} . \frac{8}{8}\\=\frac{3}{8} . \frac{1}{1}\\=\frac{3.1}{8.1}\\=\frac{3}{8}\)
12. \(\frac{10}{3} . \frac{2}{12}\\=\frac{10}{3} . \frac{1}{6}\\=\frac{10.1}{3.6}\\=\frac{10}{18}\\=\frac{5}{9}\)