Question

chuyển các hỗn số sau thành phân số:

\(8\dfrac{2}{5};5\dfrac{3}{4};4\dfrac{3}{7};2\dfrac{1}{10}\)

Answer 1

\(8\dfrac{2}{5}=\dfrac{42}{5}\)

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

\(4\dfrac{3}{7}=\dfrac{31}{7}\)

\(2\dfrac{1}{10}=\dfrac{21}{10}\)

Answer 2

`8 2/5=( (8xx5)+2 )/5=(40+2)/5=42/5`

`5 3/4=( (5xx4)+3 )/4=(20+3)/4=23/4`

`4 3/7=( (4xx7) + 3)/7=(28+3)/7=31/7`

`2 1/10=( (2xx10)+1)/10=(20+1)/10=21/10`