Question

Answer 1

\(=\left(\dfrac{1}{2}+\dfrac{5}{2}\right)+\left(-\dfrac{4}{7}+\dfrac{-3}{7}\right)=\dfrac{6}{2}-\dfrac{7}{7}=3-1=2\)

Answer 2

\(\left(\dfrac{1}{2}+\dfrac{5}{2}\right)+\left(-\dfrac{3}{7}-\dfrac{4}{7}\right)=\dfrac{6}{2}-\dfrac{7}{7}=3-1=2\)

Answer 3

\(\dfrac{1}{2}+\dfrac{-3}{7}+\dfrac{5}{2}-\dfrac{4}{7}=\left(\dfrac{1}{2}+\dfrac{5}{2}\right)+\left(\dfrac{-3}{7}-\dfrac{4}{7}\right)=3+\left(-1\right)=2\)

Answer 4

1/2+(-3/7)+5/2-4/7

1/2+(-3/4)+5/2+(-4/7) 

(1/2+5/2) +(-3/7+-4/7) 

6/2+(-7/7) 

3+(-1) 

2