Breuken aftrekken (reeks 2)

Hoofdmenu Eentje per keer  🖨

Trek de breuken af

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

---

Trek de breuken af

Verbetersleutel

1. \(\frac{3}{10}-\frac{9}{7}\\=\frac{21}{70}-\frac{90}{70}\\=\frac{21-90}{70}\\=\frac{-69}{70}\)
2. \(\frac{10}{11}-\frac{19}{2}\\=\frac{20}{22}-\frac{209}{22}\\=\frac{20-209}{22}\\=\frac{-189}{22}\)
3. \(\frac{-3}{17}-\frac{9}{2}\\=\frac{-6}{34}-\frac{153}{34}\\=\frac{-6-153}{34}\\=\frac{-159}{34}\)
4. \(\frac{-19}{14}-\frac{3}{20}\\=\frac{-190}{140}-\frac{21}{140}\\=\frac{-190-21}{140}\\=\frac{-211}{140}\)
5. \(\frac{20}{17}-\frac{3}{5}\\=\frac{100}{85}-\frac{51}{85}\\=\frac{100-51}{85}\\=\frac{49}{85}\)
6. \(\frac{-15}{13}-\frac{12}{13}\\=\frac{-15-12}{13}\\=\frac{-27}{13}\)
7. \(\frac{-20}{13}-\frac{7}{6}\\=\frac{-120}{78}-\frac{91}{78}\\=\frac{-120-91}{78}\\=\frac{-211}{78}\)
8. \(\frac{8}{17}-\frac{5}{19}\\=\frac{152}{323}-\frac{85}{323}\\=\frac{152-85}{323}\\=\frac{67}{323}\)
9. \(\frac{-3}{5}-\frac{20}{3}\\=\frac{-9}{15}-\frac{100}{15}\\=\frac{-9-100}{15}\\=\frac{-109}{15}\)
10. \(\frac{-19}{3}-\frac{11}{15}\\=\frac{-95}{15}-\frac{11}{15}\\=\frac{-95-11}{15}\\=\frac{-106}{15}\)
11. \(\frac{16}{7}-\frac{3}{8}\\=\frac{128}{56}-\frac{21}{56}\\=\frac{128-21}{56}\\=\frac{107}{56}\)
12. \(\frac{18}{7}-\frac{8}{13}\\=\frac{234}{91}-\frac{56}{91}\\=\frac{234-56}{91}\\=\frac{178}{91}\)