Question

Thực hiện phép tính:

a) \(\frac{4}{13}+\frac{9}{5}\)                 c) \(\frac{12}{31}\times\frac{1}{19}\)

b) \(3-\frac{2}{16}\)                  d \(\frac{3}{8}\div\frac{9}{12}\)

Answer 1

\(\frac{4}{13}+\frac{9}{5}=\frac{137}{65}\)

\(3-\frac{2}{16}=\frac{23}{8}\)

\(\frac{12}{31}\times\frac{1}{19}=\frac{12}{589}\)

\(\frac{3}{8}\div\frac{9}{12}=\frac{1}{2}\)

Answer 2

\(\text{Trả lời :}\)

\(\frac{4}{13}+\frac{9}{5}=\frac{137}{65}\)

\(3-\frac{2}{16}=\frac{23}{8}\)

\(\frac{12}{31}\times\frac{1}{19}=\frac{12}{589}\)

\(\frac{3}{8}\div\frac{9}{12}=\frac{1}{2}\)

\(\text{~~Học tốt~~}\)

Answer 3

a ) 4/13 + 9/5 = 40/65 + 117/65 = 157/65                                           b ) 3 - 2/16 = 3/1 - 2/ 6 = 16/6                                                                              c ) 12/31 x 1/19 = 12/ 589                                                        d ) 3/8 : 9/12 = 3/8 x 12/9 = 1/2