Lựa chọn đáp án đúng nhất : \(\Large{1\dfrac{3}{5}\times{2\dfrac{1}{7}

Lựa chọn đáp án đúng nhất :

 

 $\Large{1\dfrac{3}{5}\times{2\dfrac{1}{7}}+3\dfrac{1}{7}}=...$

• A.

  $\Large\dfrac{45}{7}$

• B.

  $\Large\dfrac{46}{7}$

• C.

  $\Large\dfrac{47}{7}$

• D.

  $\Large\dfrac{48}{7}$

 $\Large{1 \dfrac{3}{5}\times{2\dfrac{1}{7}}+3\dfrac{1}{7}}$

= $\Large \dfrac{8}{5}\times \dfrac{15}{7}+\dfrac{22}{7}$

= $\Large \dfrac{120}{35}+\dfrac{22}{7}$

=  $\Large \dfrac{24}{7}+\dfrac{22}{7}$

=  $\Large \dfrac{46}{7}$