Breuken aftrekken (reeks 1)

Hoofdmenu Eentje per keer  🖨

Trek de breuken af

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

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Trek de breuken af

Verbetersleutel

1. \(\frac{8}{3}-\frac{7}{8}\\=\frac{64}{24}-\frac{21}{24}\\=\frac{64-21}{24}\\=\frac{43}{24}\)
2. \(\frac{8}{5}-\frac{2}{9}\\=\frac{72}{45}-\frac{10}{45}\\=\frac{72-10}{45}\\=\frac{62}{45}\)
3. \(\frac{4}{3}-\frac{9}{7}\\=\frac{28}{21}-\frac{27}{21}\\=\frac{28-27}{21}\\=\frac{1}{21}\)
4. \(\frac{2}{3}-\frac{3}{11}\\=\frac{22}{33}-\frac{9}{33}\\=\frac{22-9}{33}\\=\frac{13}{33}\)
5. \(\frac{6}{5}-\frac{3}{5}\\=\frac{6-3}{5}\\=\frac{3}{5}\)
6. \(\frac{8}{3}-\frac{4}{7}\\=\frac{56}{21}-\frac{12}{21}\\=\frac{56-12}{21}\\=\frac{44}{21}\)
7. \(\frac{9}{2}-\frac{7}{9}\\=\frac{81}{18}-\frac{14}{18}\\=\frac{81-14}{18}\\=\frac{67}{18}\)
8. \(\frac{8}{5}-\frac{3}{8}\\=\frac{64}{40}-\frac{15}{40}\\=\frac{64-15}{40}\\=\frac{49}{40}\)
9. \(\frac{10}{7}-\frac{3}{7}\\=\frac{10-3}{7}\\=\frac{7}{7}\\=1\)
10. \(\frac{4}{9}-\frac{3}{11}\\=\frac{44}{99}-\frac{27}{99}\\=\frac{44-27}{99}\\=\frac{17}{99}\)
11. \(\frac{7}{2}-\frac{5}{8}\\=\frac{28}{8}-\frac{5}{8}\\=\frac{28-5}{8}\\=\frac{23}{8}\)
12. \(\frac{8}{5}-\frac{8}{7}\\=\frac{56}{35}-\frac{40}{35}\\=\frac{56-40}{35}\\=\frac{16}{35}\)