Breuken aftrekken (reeks 2)

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Trek de breuken af

1. \(\frac{-6}{7}-\frac{16}{9}\)
2. \(\frac{-19}{4}-\frac{20}{3}\)
3. \(\frac{-18}{13}-\frac{8}{5}\)
4. \(\frac{-5}{3}-\frac{17}{4}\)
5. \(\frac{-6}{13}-\frac{11}{7}\)
6. \(\frac{19}{12}-\frac{2}{5}\)
7. \(\frac{3}{8}-\frac{6}{5}\)
8. \(\frac{-14}{15}-\frac{7}{2}\)
9. \(\frac{4}{3}-\frac{20}{17}\)
10. \(\frac{7}{4}-\frac{7}{19}\)
11. \(\frac{-17}{5}-\frac{20}{7}\)
12. \(\frac{-8}{17}-\frac{5}{12}\)

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Trek de breuken af

Verbetersleutel

1. \(\frac{-6}{7}-\frac{16}{9}\\=\frac{-54}{63}-\frac{112}{63}\\=\frac{-54-112}{63}\\=\frac{-166}{63}\)
2. \(\frac{-19}{4}-\frac{20}{3}\\=\frac{-57}{12}-\frac{80}{12}\\=\frac{-57-80}{12}\\=\frac{-137}{12}\)
3. \(\frac{-18}{13}-\frac{8}{5}\\=\frac{-90}{65}-\frac{104}{65}\\=\frac{-90-104}{65}\\=\frac{-194}{65}\)
4. \(\frac{-5}{3}-\frac{17}{4}\\=\frac{-20}{12}-\frac{51}{12}\\=\frac{-20-51}{12}\\=\frac{-71}{12}\)
5. \(\frac{-6}{13}-\frac{11}{7}\\=\frac{-42}{91}-\frac{143}{91}\\=\frac{-42-143}{91}\\=\frac{-185}{91}\)
6. \(\frac{19}{12}-\frac{2}{5}\\=\frac{95}{60}-\frac{24}{60}\\=\frac{95-24}{60}\\=\frac{71}{60}\)
7. \(\frac{3}{8}-\frac{6}{5}\\=\frac{15}{40}-\frac{48}{40}\\=\frac{15-48}{40}\\=\frac{-33}{40}\)
8. \(\frac{-14}{15}-\frac{7}{2}\\=\frac{-28}{30}-\frac{105}{30}\\=\frac{-28-105}{30}\\=\frac{-133}{30}\)
9. \(\frac{4}{3}-\frac{20}{17}\\=\frac{68}{51}-\frac{60}{51}\\=\frac{68-60}{51}\\=\frac{8}{51}\)
10. \(\frac{7}{4}-\frac{7}{19}\\=\frac{133}{76}-\frac{28}{76}\\=\frac{133-28}{76}\\=\frac{105}{76}\)
11. \(\frac{-17}{5}-\frac{20}{7}\\=\frac{-119}{35}-\frac{100}{35}\\=\frac{-119-100}{35}\\=\frac{-219}{35}\)
12. \(\frac{-8}{17}-\frac{5}{12}\\=\frac{-96}{204}-\frac{85}{204}\\=\frac{-96-85}{204}\\=\frac{-181}{204}\)