Question

tính

 

Answer 1

`3 2/5 xx 1 4/7 + 12/35`

`=17/5 xx 11/7 + 12/35`

`= 187/35 + 12/35`

`=(187+12)/35`

`=199/35`

Answer 2

\(b,\) \(3\dfrac{2}{5}\times1\dfrac{4}{7}+\dfrac{12}{35}\)

\(=\dfrac{17}{5}\times\dfrac{11}{7}+\dfrac{12}{35}\)
 

\(=\dfrac{187}{35}+\dfrac{12}{35}\)
 

\(=\dfrac{199}{35}\)