a. \(\left(\dfrac{1}{3}+\dfrac{2}{3}\right)+\dfrac{3}{4}=1+\dfrac{3}{4}=\dfrac{7}{4}\)
b. \(\dfrac{3}{4}+\dfrac{3}{5}+\dfrac{2}{8}+\dfrac{4}{10}=\left(\dfrac{3}{4}+\dfrac{2}{8}\right)+\left(\dfrac{3}{5}+\dfrac{4}{10}\right)=1+1=2\)
a ) `1/3 + 3/4 + 2/3 + 1/4 `
`= (1/3 + 2/3 )+ (3/4 + 1/4)`
`= 1 + 1 `
`= 2
b 3/4 + 3/5 + 2 phần 8 + 4/10`
`= (3/4 + 2/8 ) + ( 3/5 + 4/10 ) `
`= 1 + 1 `
`= 2`