- 1. Solve this problem using mental math 40 + 35 =
A) 75
B) 70
C) 80
- 2. Solve this problem using mental math 73 + 22 =
A) 95
B) 105
C) 85
- 3. Solve this problem using mental math 49 + 30 =
A) 69
B) 89
C) 79
- 4. If you broke these numbers apart to add them then which answer would they look like? 53 + 41 =
A) 50 + 40 and 3 + 1=
B) 41 + 53 =
C) 53+ 40 =
- 5. Which property helps you solve 89 + 0 = 89?
A) Commutative
B) Identity
C) Associative
- 6. Solve this problem using mental math 77 + 43 =
A) 120
B) 100
C) 130
- 7. (10 + 10) + 30 is the same as which answer?
A) 10 + 10 + 30 + 10 =
B) 10 + (30) =
C) 10 + (10 +30) =
- 8. Which property means "grouping"?
A) Identity
B) Associative
C) Commutative
- 9. Solve this problem using mental math 33 + 21 + 44
A) 88
B) 99
C) 98
- 10. If you broke these numbers apart to add them, then which answer would they look like? 92 + 35
A) 90 + 2 and 30 + 5 =
B) 92 + 30 =
C) 90 + 30 + 2 =
|