Question

tính thuận tiện nhất

9/14 + 19/18 + 19/14 + 35/18

Answer 1

\(\dfrac{9}{14}+\dfrac{19}{18}+\dfrac{19}{14}+\dfrac{35}{18}=\left(\dfrac{9}{14}+\dfrac{19}{14}\right)+\left(\dfrac{19}{18}+\dfrac{35}{18}\right)=\dfrac{28}{14}+\dfrac{54}{18}=2+3=5\)

Answer 2

\(=\left(\dfrac{9}{14}+\dfrac{19}{14}\right)+\left(\dfrac{19}{18}+\dfrac{35}{18}\right)=2+3=5\)

Answer 3

\(\dfrac{9}{14}+\dfrac{19}{18}+\dfrac{19}{14}+\dfrac{35}{18}\\ =\left(\dfrac{9}{14}+\dfrac{19}{14}\right)+\left(\dfrac{19}{18}+\dfrac{35}{18}\right)\\ =\dfrac{28}{18}+\dfrac{54}{18}\\ =2+3=5\)

Answer 4