Breuken aftrekken (reeks 2)

Hoofdmenu Eentje per keer  🖨

Trek de breuken af

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

---

Trek de breuken af

Verbetersleutel

1. \(\frac{-9}{5}-\frac{18}{5}\\=\frac{-9-18}{5}\\=\frac{-27}{5}\)
2. \(\frac{-1}{15}-\frac{16}{19}\\=\frac{-19}{285}-\frac{240}{285}\\=\frac{-19-240}{285}\\=\frac{-259}{285}\)
3. \(\frac{-3}{19}-\frac{11}{9}\\=\frac{-27}{171}-\frac{209}{171}\\=\frac{-27-209}{171}\\=\frac{-236}{171}\)
4. \(\frac{-3}{7}-\frac{12}{17}\\=\frac{-51}{119}-\frac{84}{119}\\=\frac{-51-84}{119}\\=\frac{-135}{119}\)
5. \(\frac{-2}{9}-\frac{16}{5}\\=\frac{-10}{45}-\frac{144}{45}\\=\frac{-10-144}{45}\\=\frac{-154}{45}\)
6. \(\frac{-19}{16}-\frac{17}{14}\\=\frac{-133}{112}-\frac{136}{112}\\=\frac{-133-136}{112}\\=\frac{-269}{112}\)
7. \(\frac{-18}{11}-\frac{17}{7}\\=\frac{-126}{77}-\frac{187}{77}\\=\frac{-126-187}{77}\\=\frac{-313}{77}\)
8. \(\frac{-8}{9}-\frac{10}{7}\\=\frac{-56}{63}-\frac{90}{63}\\=\frac{-56-90}{63}\\=\frac{-146}{63}\)
9. \(\frac{-3}{10}-\frac{3}{13}\\=\frac{-39}{130}-\frac{30}{130}\\=\frac{-39-30}{130}\\=\frac{-69}{130}\)
10. \(\frac{-2}{9}-\frac{20}{7}\\=\frac{-14}{63}-\frac{180}{63}\\=\frac{-14-180}{63}\\=\frac{-194}{63}\)
11. \(\frac{-20}{3}-\frac{5}{4}\\=\frac{-80}{12}-\frac{15}{12}\\=\frac{-80-15}{12}\\=\frac{-95}{12}\)
12. \(\frac{-11}{6}-\frac{10}{17}\\=\frac{-187}{102}-\frac{60}{102}\\=\frac{-187-60}{102}\\=\frac{-247}{102}\)