### Math Olympiad K1_16 on Day:.........Month:..........Year:...........

Total Core =

Question 1: If X is a 1-digit number. What is its value in the number sentence below ?

17 - X = 12
Question 2: If X is a 1-digit number. What is its value in the number sentence below ?

19 - X = 15
Question 3: If X is a 1-digit number. What is its value in the number sentence below ?

20 - X = 19
Question 4: If X is a 1-digit number. What is its value in the number sentence below ?

30 - X = 25
Question 5: If X is a 1-digit number. What is its value in the number sentence below ?

35 - X = 30
Question 6: If X is a 1-digit number. What is its value in the number sentence below ?

45 + X = 48
Question 7: In 20 yeas time, Tong will be 45 years old. How old is Tong now ?
Question 8: Find the value of 2 + 2 + 3 + 4 + 5 + 4
Question 9: Find the value of 1 + 1 + 1 + 11 + 1 + 11
Question 10: Find the value of 2 + 2 + 2 + 2 + 2 + 22