Question

2/5 +3/5 + -10/21

Answer 1

\(\dfrac{2}{5}+\dfrac{3}{5}+\dfrac{-10}{21}\\ =1+\dfrac{-10}{21}\\ =\dfrac{21}{21}+\dfrac{-10}{21}\\ =\dfrac{11}{21}\)

Answer 2

\(\dfrac{2}{5}+\dfrac{3}{5}+\dfrac{-10}{21}=1+\dfrac{-10}{21}=\dfrac{11}{21}\)

Answer 3

`2/5 + 3/5 +(-10/21)`

`= (2+3)/5  +(-10/21)`

`= 5/5 +(-10/21)`

`= 1 +(-10/21)`

`= 21/21 +(-10/21)`

`=11/21`