`a,[-5]/17 . 31/33 + [-5]/17 . 2/33 + 1 5/17`
`=[-5]/17(31/33+2/33)+22/17`
`=[-5]/17 . 1 + 22/17`
`= [-5]/17+22/17`
`= 1`
`b,4/7+3/7(-2/3)`
`= 4/7+(-2/7)`
`= 2/7`
`c, [9^3 . 3^2]/[3^9].2022`
`= [3^6 . 3^2]/[3^9].2022`
`= [3^8]/[3^9].2022`
`= 1/3. 2022`
`= 2022/3`
`=674`
`d,3-(-2020/2021)^0 + (1/2)^3 . 16`
`= 3 - 1 + 1/8 . 16`
`= 3-1+2`
`= 4`
Học tốt !