Question

tính bằng cách thuận tiện nhất : 

23/11 + ( 1/5 + 10/11 )

 

Answer 1

giúp mk với

Answer 2

(23/11+10/11) + 1/5

= 3 + 1/5 

= 16/5

Answer 3

    \(\dfrac{23}{11}+\left(\dfrac{1}{5}+\dfrac{10}{11}\right)\)

\(=\dfrac{23}{11}+\dfrac{1}{5}+\dfrac{10}{11}\)

\(=\left(\dfrac{23}{11}+\dfrac{10}{11}\right)+\dfrac{1}{5}\)

\(=3+\dfrac{1}{5}=\dfrac{3}{1}+\dfrac{1}{5}\)

\(=\dfrac{15}{5}+\dfrac{1}{5}\) \(=\dfrac{15+1}{5}=\dfrac{16}{5}\)