Question

Chuyển các hỗn số sau thành phân số:

a) 2 1/3,4 2/5,3 1/4,9 5/7,11 3/10

b) 5 2/17,3 6/23,7 4/9,121 15/100,8 3/7

 

Answer 1

a/\(2\frac{1}{3}=\frac{2.3+1}{3}=\frac{7}{3}\)

\(4\frac{2}{5}=\frac{4.5+2}{5}=\frac{22}{5}\)

\(3\frac{1}{4}=\frac{3.4+1}{4}=\frac{13}{4}\)

\(9\frac{5}{7}=\frac{9.7+5}{7}=\frac{68}{7}\)

\(11\frac{3}{10}=\frac{11.10+3}{10}=\frac{113}{10}\)

b/\(5\frac{2}{17}=\frac{5.17+2}{17}=\frac{87}{17}\)

\(3\frac{6}{23}=\frac{3.23+6}{23}=\frac{75}{23}\)

\(7\frac{4}{9}=\frac{7.9+4}{9}=\frac{67}{9}\)

\(121\frac{15}{100}=\frac{121.100+15}{100}=\frac{12115}{100}\)

\(8\frac{3}{7}=\frac{8.7+3}{7}=\frac{59}{7}\)