Mon. 9/26 - HW # 1 - 10 & 16 - 22

1. What is the identity element for addition?

2. What is the sum of two numbers that are additive inverses?

3. What is the additive inverse of 23?

4. What number is its own additive inverse?

5. Which property is shown?

2 + 3 = 3 + 2

• Associative

• Commutative

• Identity

• Inverse

6. Which property is shown?

–5 + 0 = –5

• Associative

• Commutative

• Identity

• Inverse

7. Which property is shown?

–3 + (2 + 7) = (–3 + 2) + 7

• Associative

• Commutative

• Identity

• Inverse

8. Which property is shown?

–12 + 12 = 0

• Closure

• Commutative

• Identity

• Inverse

9. Which property is shown?

Since –3 and 5 are integers, –3 + 5 is an integer.

• Closure

• Commutative

• Identity

• Inverse

10. Which property is shown?

–8 + 5 = 5 – 8

• Closure

• Commutative

• Identity

• Inverse