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.

  \(\Large\dfrac{48}{7}\)

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

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

= \(\Large \dfrac{120}{35}+\dfrac{22}{7}\)

=  \(\Large \dfrac{24}{7}+\dfrac{22}{7}\)

=  \(\Large \dfrac{46}{7}\)