- Ôn tập khái niệm phân số và tính chất cơ bản của...

A \(\frac{1}{4}\)  

B \(\frac{1}{2}\)

C \(\frac{1}{8}\)  

D \(\frac{1}{6}\)

A 389

B 983

C 938

D 398

A Mười tám phần hai mươi năm 

B Hai mươi lăm phần mười tám

C Hai lăm phần mười tám          

D Mười tám phần hai mươi lăm   

A \(4:7\)  

B \(7:4\)

C \(4 \times 7\)  

D \(4 + 7\)  

A \(\frac{{2018}}{2}\)

B \(\frac{1}{{2018}}\)

C \(\frac{{2018}}{1}\)     

D \(\frac{{2018}}{0}\)  

A \(0 = \frac{0}{{21}}\)  

B \(0 = \frac{0}{1}\)

C \(0 = \frac{0}{{2018}}\)

D \(0 = \frac{{2018}}{0}\)  

A \(1 = \frac{{19}}{9}\)

B \(1 = \frac{{20}}{{10}}\)  

C \(1 = \frac{0}{1}\)

D \(1 = \frac{{15}}{{15}}\)

A \(\frac{{29}}{{42}}\)

B \(\frac{{42}}{{29}}\)  

C \(\frac{{92}}{{24}}\)

D \(\frac{{29}}{{24}}\)

A \(\begin{array}{l}a)\,\,\frac{{20}}{{36}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{2}{5}\\b)\,\,\frac{7}{{11}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{1}{3}\end{array}\)

B \(\begin{array}{l}a)\,\,\frac{{20}}{{36}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{2}{9}\\b)\,\,\frac{7}{{11}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{1}{5}\end{array}\)

C \(\begin{array}{l}a)\,\,\frac{{30}}{{36}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{2}{5}\\b)\,\,\frac{7}{{12}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{1}{3}\end{array}\)

D \(\begin{array}{l}a)\,\,\frac{{20}}{{36}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{2}{9}\\b)\,\,\frac{7}{{12}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{1}{5}\end{array}\)

A \(a)\,\,\frac{{20}}{{24}}\,\) và \(\frac{9}{{24}}\)                            \(b)\,\,\frac{{45}}{{63}}\,\) và \(\frac{{28}}{{63}}\)

\(c)\,\,\frac{9}{{24}}\,\) và \(\frac{7}{{24}}\)                                  \(d)\,\,\frac{9}{{12}}\,\) và \(\frac{{14}}{{12}}\)

B \(a)\,\,\frac{{15}}{{24}}\,\) và \(\frac{9}{{24}}\)                            \(b)\,\,\frac{{45}}{{63}}\,\) và \(\frac{{28}}{{63}}\)

\(c)\,\,\frac{9}{{24}}\,\) và \(\frac{7}{{24}}\)                                  \(d)\,\,\frac{9}{{12}}\,\) và \(\frac{{21}}{{12}}\)

C \(a)\,\,\frac{{20}}{{24}}\,\) và \(\frac{9}{{24}}\)                            \(b)\,\,\frac{{40}}{{63}}\,\) và \(\frac{{28}}{{63}}\)

\(c)\,\,\frac{9}{{24}}\,\) và \(\frac{{14}}{{48}}\)                                  \(d)\,\,\frac{9}{{12}}\,\) và \(\frac{{14}}{{12}}\)

D \(a)\,\,\frac{{20}}{{24}}\,\) và \(\frac{{15}}{{24}}\)                            \(b)\,\,\frac{{45}}{{63}}\,\) và \(\frac{{28}}{{63}}\)

\(c)\,\,\frac{9}{{24}}\,\) và \(\frac{7}{{24}}\)                                  \(d)\,\,\frac{6}{{12}}\,\) và \(\frac{{14}}{{12}}\)

A \(\begin{array}{l}a)\,\,\frac{3}{5};\,\,\frac{4}{7};\,\,\frac{2}{3}\\b)\,\,\frac{1}{2};\,\,\frac{5}{7};\,\,\frac{4}{5}\end{array}\)

B \(\begin{array}{l}a)\,\,\frac{4}{7};\,\,\frac{3}{5};\,\,\frac{2}{3}\\b)\,\,\frac{5}{7};\,\,\frac{1}{2};\,\,\frac{4}{5}\end{array}\)

C \(\begin{array}{l}a)\,\,\frac{2}{3};\,\,\frac{3}{5};\,\,\frac{4}{7}\\b)\,\,\frac{4}{5};\,\,\frac{5}{7};\,\,\frac{1}{2}\end{array}\)

D \(\begin{array}{l}a)\,\,\frac{4}{7};\,\,\frac{3}{5};\,\,\frac{2}{3}\\b)\,\,\frac{4}{5};\,\,\frac{5}{7};\,\,\frac{1}{2}\end{array}\)

A \(\begin{array}{l}\frac{{36}}{{54}} = \frac{6}{8}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{27}}{{45}} = \frac{3}{5}\\\frac{5}{7} = \frac{{35}}{{49}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{27}}{{36}} = \frac{2}{3}\end{array}\)

B \(\begin{array}{l}\frac{{36}}{{54}} = \frac{2}{3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{27}}{{45}} = \frac{5}{7}\\\frac{3}{5} = \frac{{35}}{{49}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{27}}{{36}} = \frac{6}{8}\end{array}\)

C \(\begin{array}{l}\frac{{36}}{{54}} = \frac{3}{5}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{27}}{{45}} = \frac{6}{8}\\\frac{2}{3} = \frac{{35}}{{49}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{27}}{{36}} = \frac{5}{7}\end{array}\)

D \(\begin{array}{l}\frac{{36}}{{54}} = \frac{2}{3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{27}}{{45}} = \frac{3}{5}\\\frac{5}{7} = \frac{{35}}{{49}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{27}}{{36}} = \frac{6}{8}\end{array}\)