If the answer is incorrect, please correct.

Here are 20 fraction questions, each with an intentional error. See if you can spot and correct them!

1. $\frac{3}{4}+\frac{2}{3}=\frac{5}{7}$
2. $\frac{5}{6}-\frac{1}{3}=\frac{4}{3}$
3. $\frac{7}{8}\times \frac{2}{5}=\frac{9}{13}$
4. $\frac{9}{10}÷\frac{3}{5}=\frac{15}{30}$
5. $\frac{4}{7}+\frac{5}{7}=\frac{4}{12}$
6. $\frac{8}{9}-\frac{1}{6}=\frac{7}{3}$
7. $\frac{3}{5}\times \frac{4}{7}=\frac{12}{5}$
8. $\frac{6}{11}÷\frac{2}{3}=\frac{6}{33}$
9. $\frac{2}{3}+\frac{4}{9}=\frac{6}{9}$
10. $\frac{5}{12}-\frac{1}{4}=\frac{4}{8}$
11. $\frac{1}{2}\times \frac{3}{4}=\frac{4}{8}$
12. $\frac{5}{9}÷\frac{2}{3}=\frac{15}{18}$
13. $\frac{7}{10}+\frac{3}{5}=\frac{10}{15}$
14. $\frac{9}{14}-\frac{2}{7}=\frac{7}{14}$
15. $\frac{4}{9}\times \frac{3}{5}=\frac{7}{14}$
16. $\frac{8}{15}÷\frac{4}{5}=\frac{2}{75}$
17. $\frac{2}{3}+\frac{5}{6}=\frac{7}{9}$
18. $\frac{3}{7}-\frac{1}{2}=\frac{2}{5}$
19. $\frac{6}{13}\times \frac{3}{4}=\frac{9}{17}$
20. $\frac{5}{8}÷\frac{2}{5}=\frac{10}{40}$