a. 4×(-135)+4.(-65)
b. 2.(2020+123)+(-2020).2
c. -5×(20+18)-5×(-8)

1. You ________ leave the hotel room before 12 o'clock
2. You ________ make lots of noise in the museum
3. My mum says you ________ always tell the truth
4. You know you ________ go to bed with your shoes on
5. I want to speak English better
I _______ practise more

B=( 3⁵+3⁷+3⁹+3¹¹ ) ÷ ( 3⁴ +3⁶+3⁸+3¹⁰ )