Tính: a) 5 – (1+ 1/3): (1-1/3)

a) 5 – 1+13:1−13

= 5 – 33+13:33−13

= 5 – 43:23

= 5 –  43.32

= 5 – 2

= 3

b) 1+23−54−1−54+2022−23

= 1+23−54−1+54+2022−23

= 23−23+−54+54+1+2022

= 0 + 0 + 2023

= 2023