Breuken aftrekken (reeks 1)

Hoofdmenu Eentje per keer 

Trek de breuken af

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

Trek de breuken af

Verbetersleutel

  1. \(\frac{8}{7}-\frac{2}{9}\\=\frac{72}{63}-\frac{14}{63}\\=\frac{72-14}{63}\\=\frac{58}{63}\)
  2. \(\frac{6}{7}-\frac{4}{11}\\=\frac{66}{77}-\frac{28}{77}\\=\frac{66-28}{77}\\=\frac{38}{77}\)
  3. \(\frac{3}{11}-\frac{2}{9}\\=\frac{27}{99}-\frac{22}{99}\\=\frac{27-22}{99}\\=\frac{5}{99}\)
  4. \(\frac{10}{7}-\frac{2}{3}\\=\frac{30}{21}-\frac{14}{21}\\=\frac{30-14}{21}\\=\frac{16}{21}\)
  5. \(\frac{7}{2}-\frac{8}{9}\\=\frac{63}{18}-\frac{16}{18}\\=\frac{63-16}{18}\\=\frac{47}{18}\)
  6. \(\frac{4}{3}-\frac{8}{9}\\=\frac{12}{9}-\frac{8}{9}\\=\frac{12-8}{9}\\=\frac{4}{9}\)
  7. \(\frac{7}{2}-\frac{7}{4}\\=\frac{14}{4}-\frac{7}{4}\\=\frac{14-7}{4}\\=\frac{7}{4}\)
  8. \(\frac{8}{3}-\frac{7}{5}\\=\frac{40}{15}-\frac{21}{15}\\=\frac{40-21}{15}\\=\frac{19}{15}\)
  9. \(\frac{8}{5}-\frac{10}{9}\\=\frac{72}{45}-\frac{50}{45}\\=\frac{72-50}{45}\\=\frac{22}{45}\)
  10. \(\frac{9}{2}-\frac{10}{11}\\=\frac{99}{22}-\frac{20}{22}\\=\frac{99-20}{22}\\=\frac{79}{22}\)
  11. \(\frac{8}{5}-\frac{2}{9}\\=\frac{72}{45}-\frac{10}{45}\\=\frac{72-10}{45}\\=\frac{62}{45}\)
  12. \(\frac{6}{5}-\frac{5}{9}\\=\frac{54}{45}-\frac{25}{45}\\=\frac{54-25}{45}\\=\frac{29}{45}\)
Oefeningengenerator vanhoeckes.be/wiskunde 2022-06-27 07:33:00