- Ôn tập: Phép nhân, phép chia hai phân số (có lời...

A \(\frac{{10}}{3}\)  

B \(\frac{{35}}{{24}}\)

C \(\frac{{21}}{{40}}\)    

D \(\frac{{59}}{{40}}\) 

A \(\frac{{52}}{{45}}\)

B \(\frac{{20}}{{117}}\)  

C \(\frac{{117}}{{20}}\)

D \(\frac{{45}}{{52}}\)

A \(\frac{2}{{27}}\)

B \(\frac{2}{3}\)

C \(\frac{6}{3}\)

D \(\frac{3}{2}\)    

A \(8\)      

B \(\frac{{11}}{8}\)         

C \(\frac{{121}}{2}\)       

D \(\frac{1}{8}\)  

A \(\frac{8}{{15}}\)         

B \(\frac{{15}}{8}\)                     

C \(\frac{5}{8}\)

D \(\frac{8}{5}\) 

A \(12\)  

B \(\frac{{75}}{{49}}\)

C \(\frac{1}{{12}}\)         

D \(\frac{{12}}{5}\)

A \(a) 35;b) 10\)

B \(a) 30;b) 10\)     

C \(a) 30;b) 5\)

D \(a) 35;b) 5\)  

A \(18;\;\;3\)        

B \(3;\;18\)  

C \(9;\;\;4\)

D \(12;\;3\) 

A \(\begin{array}{l}a)\;\frac{5}{{24}} &  &  & b)\;\frac{{18}}{7}  &  & c)\;\frac{{14}}{{15}}\\d)\;\frac{2}{3} &  &  & e)\;\frac{{21}}{2} &  & f)\;\frac{8}{{57}}\end{array}\)

B \(\begin{array}{l}a)\;\frac{5}{{24}} &  &  & b)\;\frac{{18}}{7}  &  & c)\;\frac{{14}}{{15}}\\d)\;\frac{3}{4} &  &  & e)\;\frac{2}{{21}} &  & f)\;\frac{8}{{57}}\end{array}\)

C \(\begin{array}{l}a)\;\frac{{15}}{{24}} &  &  & b)\;\frac{{18}}{7} &  & c)\;\frac{{14}}{{15}}\\d)\;\frac{2}{3} &  &  & e)\;\frac{{21}}{2} &  & f)\;\frac{8}{{54}}\end{array}\)

D \(\begin{array}{l}a)\;\frac{5}{{24}} &  &  & b)\;\frac{{15}}{7} &  & c)\;\frac{7}{{30}}\\d)\;\frac{2}{3} &  &  & e)\;\frac{2}{{21}} &  & f)\;\frac{8}{{57}}\end{array}\)

A \(\frac{1}{4};\,\frac{7}{8};\,\frac{{77}}{{16}}\)

B \(\frac{1}{8};\,\frac{7}{8};\,\frac{{77}}{8}\)

C \(\frac{1}{{16}};\,\frac{7}{{16}};\,\frac{{77}}{{16}}\)

D \(\frac{1}{4};\,\frac{7}{{16}};\,\frac{7}{{22}}\)

A \(\left( I \right),\left( {III} \right)\) đúng; \(\left( {II} \right)\) sai

B \(\left( I \right),\left( {II} \right)\) đúng; \(\left( {III} \right)\) sai

C Cả ba đều đúng

D Cả ba đều sai

A 1 m

B 2 m

C 3 m

D 4 m

A \(x = y\)

B \(x\,\, < \,\,y\)

C \(x\,\, > \,\,y\)