Vòng 2 - Vòng sơ khảo

Question 2: 8

Question 5: -3

Question 6: 18

Question 7: 333.3

Question 8: 9

Question 10: 6

Question 12: 0.75

Question 13: (4 ; 3)

Question 14: 1.4

Question 19: 0.96