Breuken optellen (reeks 1)

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Tel de breuken op

1. \(\frac{9}{2}+\frac{9}{7}\)
2. \(\frac{4}{3}+\frac{7}{8}\)
3. \(\frac{3}{10}+\frac{2}{11}\)
4. \(\frac{10}{3}+\frac{3}{4}\)
5. \(\frac{8}{7}+\frac{5}{6}\)
6. \(\frac{7}{9}+\frac{5}{11}\)
7. \(\frac{9}{2}+\frac{4}{11}\)
8. \(\frac{7}{8}+\frac{2}{9}\)
9. \(\frac{8}{3}+\frac{10}{7}\)
10. \(\frac{4}{3}+\frac{7}{9}\)
11. \(\frac{9}{5}+\frac{2}{11}\)
12. \(\frac{9}{7}+\frac{3}{4}\)

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Tel de breuken op

Verbetersleutel

1. \(\frac{9}{2}+\frac{9}{7}\\=\frac{63}{14}+\frac{18}{14}\\=\frac{63+18}{14}\\=\frac{81}{14}\)
2. \(\frac{4}{3}+\frac{7}{8}\\=\frac{32}{24}+\frac{21}{24}\\=\frac{32+21}{24}\\=\frac{53}{24}\)
3. \(\frac{3}{10}+\frac{2}{11}\\=\frac{33}{110}+\frac{20}{110}\\=\frac{33+20}{110}\\=\frac{53}{110}\)
4. \(\frac{10}{3}+\frac{3}{4}\\=\frac{40}{12}+\frac{9}{12}\\=\frac{40+9}{12}\\=\frac{49}{12}\)
5. \(\frac{8}{7}+\frac{5}{6}\\=\frac{48}{42}+\frac{35}{42}\\=\frac{48+35}{42}\\=\frac{83}{42}\)
6. \(\frac{7}{9}+\frac{5}{11}\\=\frac{77}{99}+\frac{45}{99}\\=\frac{77+45}{99}\\=\frac{122}{99}\)
7. \(\frac{9}{2}+\frac{4}{11}\\=\frac{99}{22}+\frac{8}{22}\\=\frac{99+8}{22}\\=\frac{107}{22}\)
8. \(\frac{7}{8}+\frac{2}{9}\\=\frac{63}{72}+\frac{16}{72}\\=\frac{63+16}{72}\\=\frac{79}{72}\)
9. \(\frac{8}{3}+\frac{10}{7}\\=\frac{56}{21}+\frac{30}{21}\\=\frac{56+30}{21}\\=\frac{86}{21}\)
10. \(\frac{4}{3}+\frac{7}{9}\\=\frac{12}{9}+\frac{7}{9}\\=\frac{12+7}{9}\\=\frac{19}{9}\)
11. \(\frac{9}{5}+\frac{2}{11}\\=\frac{99}{55}+\frac{10}{55}\\=\frac{99+10}{55}\\=\frac{109}{55}\)
12. \(\frac{9}{7}+\frac{3}{4}\\=\frac{36}{28}+\frac{21}{28}\\=\frac{36+21}{28}\\=\frac{57}{28}\)