Breuken aftrekken (reeks 2)

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Trek de breuken af

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

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Trek de breuken af

Verbetersleutel

1. \(\frac{17}{4}-\frac{18}{5}\\=\frac{85}{20}-\frac{72}{20}\\=\frac{85-72}{20}\\=\frac{13}{20}\)
2. \(\frac{16}{13}-\frac{2}{9}\\=\frac{144}{117}-\frac{26}{117}\\=\frac{144-26}{117}\\=\frac{118}{117}\)
3. \(\frac{14}{11}-\frac{6}{17}\\=\frac{238}{187}-\frac{66}{187}\\=\frac{238-66}{187}\\=\frac{172}{187}\)
4. \(\frac{-9}{14}-\frac{7}{4}\\=\frac{-18}{28}-\frac{49}{28}\\=\frac{-18-49}{28}\\=\frac{-67}{28}\)
5. \(\frac{-13}{7}-\frac{20}{17}\\=\frac{-221}{119}-\frac{140}{119}\\=\frac{-221-140}{119}\\=\frac{-361}{119}\)
6. \(\frac{19}{11}-\frac{3}{11}\\=\frac{19-3}{11}\\=\frac{16}{11}\)
7. \(\frac{6}{19}-\frac{9}{19}\\=\frac{6-9}{19}\\=\frac{-3}{19}\)
8. \(\frac{-20}{9}-\frac{4}{13}\\=\frac{-260}{117}-\frac{36}{117}\\=\frac{-260-36}{117}\\=\frac{-296}{117}\)
9. \(\frac{-1}{17}-\frac{4}{13}\\=\frac{-13}{221}-\frac{68}{221}\\=\frac{-13-68}{221}\\=\frac{-81}{221}\)
10. \(\frac{9}{16}-\frac{13}{17}\\=\frac{153}{272}-\frac{208}{272}\\=\frac{153-208}{272}\\=\frac{-55}{272}\)
11. \(\frac{7}{17}-\frac{6}{17}\\=\frac{7-6}{17}\\=\frac{1}{17}\)
12. \(\frac{11}{18}-\frac{18}{11}\\=\frac{121}{198}-\frac{324}{198}\\=\frac{121-324}{198}\\=\frac{-203}{198}\)