Question

[Mai gia bảo]

Bài 1: (Đề 1) Chuyển các hỗn số sau thành phân số

\(2\dfrac{3}{4}\) =.........................................=..........................

\(3\dfrac{4}{5}\) =.........................................=..........................

\(4\dfrac{3}{5}\) =.........................................=..........................

\(11\dfrac{12}{13}\)=.........................................=.......................

\(12\dfrac{11}{13}\)=.........................................=.......................

\(3\dfrac{3}{5}\) =.........................................=..........................

Answer 1

[Phạm Quang Lộc]

\(2\dfrac{3}{4}=\dfrac{2\times4+3}{4}=\dfrac{11}{4}\\ 3\dfrac{4}{5}=\dfrac{3\times5+4}{5}=\dfrac{19}{5}\\ 4\dfrac{3}{5}=\dfrac{4\times5+3}{5}=\dfrac{23}{5}\\ 11\dfrac{12}{13}=\dfrac{11\times13+12}{13}=\dfrac{155}{13}\\ 12\dfrac{11}{13}=\dfrac{12\times13+11}{13}=\dfrac{167}{13}\\ 3\dfrac{3}{5}=\dfrac{3\times5+3}{5}=\dfrac{18}{5}\)

Answer 2

[Trần Đình Thiên]

2\(\dfrac{3}{4}\)=\(\dfrac{11}{4}\)

3\(\dfrac{4}{5}\)=\(\dfrac{19}{5}\)

4\(\dfrac{3}{5}\)=\(\dfrac{23}{5}\)

11\(\dfrac{12}{13}\)=\(\dfrac{155}{13}\)

12\(\dfrac{11}{13}\)=\(\dfrac{167}{13}\)

3\(\dfrac{3}{5}\)=\(\dfrac{18}{5}\).