Breuken aftrekken (reeks 2)

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Trek de breuken af

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

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Trek de breuken af

Verbetersleutel

1. \(\frac{-14}{3}-\frac{3}{13}\\=\frac{-182}{39}-\frac{9}{39}\\=\frac{-182-9}{39}\\=\frac{-191}{39}\)
2. \(\frac{8}{3}-\frac{3}{8}\\=\frac{64}{24}-\frac{9}{24}\\=\frac{64-9}{24}\\=\frac{55}{24}\)
3. \(\frac{18}{5}-\frac{10}{7}\\=\frac{126}{35}-\frac{50}{35}\\=\frac{126-50}{35}\\=\frac{76}{35}\)
4. \(\frac{-7}{11}-\frac{7}{4}\\=\frac{-28}{44}-\frac{77}{44}\\=\frac{-28-77}{44}\\=\frac{-105}{44}\)
5. \(\frac{-10}{9}-\frac{20}{7}\\=\frac{-70}{63}-\frac{180}{63}\\=\frac{-70-180}{63}\\=\frac{-250}{63}\)
6. \(\frac{20}{19}-\frac{13}{16}\\=\frac{320}{304}-\frac{247}{304}\\=\frac{320-247}{304}\\=\frac{73}{304}\)
7. \(\frac{7}{3}-\frac{2}{5}\\=\frac{35}{15}-\frac{6}{15}\\=\frac{35-6}{15}\\=\frac{29}{15}\)
8. \(\frac{2}{11}-\frac{10}{19}\\=\frac{38}{209}-\frac{110}{209}\\=\frac{38-110}{209}\\=\frac{-72}{209}\)
9. \(\frac{-19}{8}-\frac{19}{12}\\=\frac{-57}{24}-\frac{38}{24}\\=\frac{-57-38}{24}\\=\frac{-95}{24}\)
10. \(\frac{-5}{2}-\frac{9}{19}\\=\frac{-95}{38}-\frac{18}{38}\\=\frac{-95-18}{38}\\=\frac{-113}{38}\)
11. \(\frac{-12}{13}-\frac{6}{7}\\=\frac{-84}{91}-\frac{78}{91}\\=\frac{-84-78}{91}\\=\frac{-162}{91}\)
12. \(\frac{15}{13}-\frac{7}{5}\\=\frac{75}{65}-\frac{91}{65}\\=\frac{75-91}{65}\\=\frac{-16}{65}\)