Read each item carefully. Choose the letter of the correct answer.

Answer:
11. b. 3
12. c. 0
13. d. -48
14. b. 64÷(-16)=-4
15. a. 0
16. b. - 70°C
17 - 18. questions is cropped. please show the entire question
19. b. 49
20. a. -8