a) | - 25 | + ( 45 - 126 + 174) - (174 + 145 - 126)

b) 25.2² - ( 9-14) + ( 29 - 34 + 20 )

1.  Tính nhanh : 2022 . 99 + 2022

2. Thực hiện phép tính : 135 . 3³ + 5 . ( 3³. 4 - 3⁴ )

This exercise is very difficult and he can’t do it.

→ This exercise is too............

This exercise is very difficult and he can’t do it.

→ This exercise is too_________________

Thực hiện phép tính :

2021. 1001 - 2021

135. 3³ + 5. ( 3³ . 4 - 3⁴ )