1. $\dfrac{42}{12}\div\dfrac{6}{6} = \dfrac{7}{2}$
2. $\dfrac{25}{20}\div\dfrac{5}{5} = \dfrac{5}{4}$
3. $\dfrac{35}{25}\div\dfrac{5}{5} = \dfrac{7}{5}$
4. $\dfrac{24}{8}\div\dfrac{8}{8} = 3$
5. $\dfrac{54}{36}\div\dfrac{9}{9} = \dfrac{6}{4}\div\dfrac{2}{2} = \dfrac{3}{2}$
6. $\dfrac{30}{24}\div \dfrac{6}{6} = \dfrac{5}{4}$
7. $\dfrac{45}{36}\div \dfrac{9}{9} = \dfrac{5}{4}$
8. $\dfrac{36}{27}\div\dfrac{9}{9} = \dfrac{4}{3}$
9. $\dfrac{27}{18}\div\dfrac{9}{9} = \dfrac{3}{2}$
10. $\dfrac{48}{18}\div\dfrac{6}{6} = \dfrac{8}{3}$
11. $\dfrac{40}{16}\div\dfrac{8}{8} = \dfrac{5}{2}$
12. $\dfrac{48}{42}\div \dfrac{6}{6} = \dfrac{8}{7}$
13. $\dfrac{63}{18}\div\dfrac{9}{9} = \dfrac{7}{2}$
14. $\dfrac{16}{12}\div\dfrac{4}{4} = \dfrac{4}{3}$
15. $\dfrac{80}{60} \div\dfrac{20}{20} = \dfrac{4}{3}$
16. $\dfrac{72}{48}\div\dfrac{12}{12} = \dfrac{6}{4}\div\dfrac{2}{2} = \dfrac{3}{2}$
17. $\dfrac{72}{60}\div\dfrac{12}{12} = \dfrac{6}{5}$
18. $\dfrac{126}{108}\div\dfrac{9}{9} = \dfrac{14}{12}\div\dfrac{2}{2} = \dfrac{7}{6}$
19. $\cancel{9} \cdot \dfrac{8}{\cancel{9}} = 8$
20. $\cancel{-2}-1\cdot -\dfrac{5}{\cancel{6}3}=\dfrac{5}{3}$
21. $2 \cdot -\dfrac{2}{9} = -\dfrac{4}{9}$
22. $-2\cdot \dfrac{1}{3}=-\dfrac{2}{3}$
23. $\cancel{-2}-1\cdot \dfrac{13}{\cancel{8}4}=-\dfrac{13}{4}$
24. $\dfrac{3}{2} \cdot \dfrac{1}{2} = \dfrac {3}{4}$
25. $-\dfrac{\cancel{6}3}{5}\cdot -\dfrac{11}{\cancel{8}4}=\dfrac{33}{20}$
26. $-\dfrac{3}{7} \cdot -\dfrac{11}{8} = \dfrac{33}{56}$
27. $\cancel{8}4 \cdot \dfrac{1}{\cancel{2}1} = 4$
28. $-2 \cdot -\dfrac{9}{7} = \dfrac{18}{7}$
29. $\dfrac{\cancel{2}1}{\cancel{3}1} \cdot \dfrac{\cancel{3}1}{\cancel{4}2} = \dfrac {1}{2}$
30. $-\dfrac{17}{\cancel{9}3} \cdot -\dfrac{\cancel{3}1}{5} = \dfrac{17}{15}$
31. $\cancel{2}1 \cdot \dfrac{3}{\cancel{2}1} = 3$
32. $\dfrac{17}{\cancel{9}3} \cdot -\dfrac{\cancel{3}1}{5} = -\dfrac{17}{15}$
33. $\dfrac{1}{2} \cdot -\dfrac{7}{5} = -\dfrac{7}{10}$
34. $\dfrac{1}{2} \cdot \dfrac{5}{7} = \dfrac{5}{14}$
35. $\dfrac{\cancel{5}1}{2} \cdot -\dfrac{0}{\cancel{5}1} = -\dfrac{0}{2}\text{ or }0$
36. $\underbrace{\dfrac{6}{0}}_{\text{undefined}} \cdot \hspace{0.25in}\dfrac{6}{7} = \text{no solution}$
37. $-2 \cdot \dfrac{4}{7} = -\dfrac{8}{7}$
38. $-\dfrac{\cancel{12}4}{7} \cdot -\dfrac{5}{\cancel{9}3} = \dfrac{20}{21}$
39. $-\dfrac{1}{9} \cdot -\dfrac{2}{1} = \dfrac{2}{9}$
40. $-2 \cdot -\dfrac{2}{3} = \dfrac{4}{3}$
41. $-\dfrac{3}{2} \cdot \dfrac{7}{13} = -\dfrac{21}{26}$
42. $\dfrac{5}{3} \cdot \dfrac{5}{7} = \dfrac{25}{21}$
43. $-1 \cdot \dfrac{3}{2} = -\dfrac{3}{2}$
44. $\dfrac{\cancel{10}5}{9} \cdot -\dfrac{1}{\cancel{6}3} = -\dfrac{5}{27}$
45. $\dfrac{8}{9} \cdot \dfrac{5}{1} = \dfrac{40}{9}$
46. $\dfrac{1}{\cancel{6}2} \cdot -\dfrac{\cancel{3}1}{5} = -\dfrac{1}{10}$
47. $-\dfrac{9}{7} \cdot \dfrac{5}{1} = -\dfrac{45}{7}$
48. $-\dfrac{13}{\cancel{8}1} \cdot -\dfrac{\cancel{8}1}{15} = \dfrac{13}{15}$
49. $-\dfrac{2}{9} \cdot -\dfrac{2}{3} = \dfrac{4}{27}$
50. $-\dfrac{4}{5} \cdot -\dfrac{8}{13} = \dfrac{32}{65}$
51. $\dfrac{1}{\cancel{10}5} \cdot \dfrac{\cancel{2}1}{3} = \dfrac{1}{15}$
52. $\dfrac{\cancel{5}1}{\cancel{3}1} \cdot \dfrac{\cancel{3}1}{\cancel{5}1} = 1$
53. $\dfrac{1}{3}-\dfrac{4}{3} = -\dfrac{3}{3}\text{ or }-1$
54. $\dfrac{1}{7}-\dfrac{11}{7} = -\dfrac{10}{7}$
55. $\dfrac{3}{7} - \dfrac{1}{7} = \dfrac{2}{7}$
56. $\dfrac{1}{3} + \dfrac{5}{3} = \dfrac{6}{3}\text{ or }2$
57. $\dfrac{11}{6} + \dfrac{7}{6} = \dfrac{18}{6}\text{ or }3$
58. $-2 - \dfrac{15}{8} \Rightarrow -\dfrac{16}{8} - \dfrac{15}{8} = -\dfrac{31}{8}$
59. $\dfrac{3}{5}+ \dfrac{5}{4} \Rightarrow \dfrac{12}{20} + \dfrac{25}{20} = \dfrac {37}{20}$
60. $-1- \dfrac{2}{3} \Rightarrow -\dfrac{3}{3} - \dfrac{2}{3} = -\dfrac{5}{3}$
61. $\dfrac{2}{5}+ \dfrac{5}{4} \Rightarrow \dfrac{8}{20} + \dfrac{25}{20} = \dfrac {33}{20}$
62. $\dfrac{12}{7} - \dfrac{9}{7} = \dfrac{3}{7}$
63. $\dfrac{9}{8}- \dfrac{2}{7} \Rightarrow \dfrac {63}{56} - \dfrac{16}{56} = \dfrac {47}{56}$
64. $-2+ \dfrac{5}{6} \Rightarrow -\dfrac{12}{6} + \dfrac{5}{6} = -\dfrac{7}{6}$
65. $1-\dfrac{1}{3} \Rightarrow \dfrac{3}{3} - \dfrac{1}{3} = \dfrac{2}{3}$
66. $\dfrac{1}{2} - \dfrac{11}{6} \Rightarrow \dfrac{3}{6} - \dfrac {11}{6} = -\dfrac{8}{6} \text{ or } -\dfrac{4}{3}$
67. $-\dfrac{1}{2} + \dfrac{3}{2} = \dfrac{2}{2}\text{ or }1$
68. $\dfrac{11}{8} - \dfrac{1}{22} \Rightarrow \dfrac{121}{88} - \dfrac{4}{88} = \dfrac{117}{88}$
69. $\dfrac{1}{5} + \dfrac{3}{4} \Rightarrow \dfrac{4}{20} + \dfrac {15}{20} = \dfrac {19}{20}$
70. $\dfrac{6}{5} - \dfrac{8}{5} = -\dfrac{2}{5}$