Answer:
1. C.
[tex] \frac{2}{3} \times 3 \frac{1}{2} = \frac{2}{3} \times \frac{7}{2} = \frac{14}{6} = \frac{7}{3} = 2 \frac{1}{3} [/tex]
2. B
[tex] \frac{4}{5} \times \frac{3}{4} = \frac{12}{20} = \frac{3}{5} [/tex]
3. B
[tex] \frac{1}{5} \times 3 \frac{1}{3} = \frac{1}{5} \times \frac{10}{3} = \frac{10}{15} = \frac{2}{3} [/tex]
4. B
[tex]n = 2 \frac{3}{6} \times \frac{3}{5} = \frac{15}{6} \times \frac{3}{5} = \frac{3}{2} \times \frac{1}{1} = \frac{3}{2} \\ n = 1 \frac{1}{2} [/tex]
5. D
[tex]7 \frac{3}{4} = \frac{31}{4} \\ \\ \frac{31}{4} \times \frac{4}{31} = \frac{1}{1} \times \frac{1}{1} = 1[/tex]
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