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Bài 33:
a, [TEX]\frac{-9}{60};\frac{22}{60};\frac{28}{60}[/TEX]
b, [TEX]\frac{216}{1260};\frac{-189}{1260};\frac{135}{1260}[/TEX]

Bài 34:
a, [TEX]\frac{-35}{35};\frac{40}{35}[/TEX]
b, [TEX]\frac{90}{30};\frac{-18}{30};\frac{-25}{30}[/TEX]
c, [TEX]\frac{-135}{105};\frac{-133}{105}; \frac{-105}{105}[/TEX]

Bài 35:

a, Rút gọn: [TEX]\frac{-1}{6};\frac{1}{5}; \frac{-1}{2}[/TEX]
Quy đồng: [TEX]\frac{-5}{30};\frac{6}{30}; \frac{-15}{30}[/TEX]

b, Rút gọn: [TEX]\frac{-3}{5};\frac{-5}{8}; \frac{-4}{9}[/TEX]
Quy đồng: [TEX]\frac{-216}{360};\frac{-225}{360}; \frac{-160}{360}[/TEX]
 
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