Page 12 - Math Course 1 (Book 2)

Properties of Identity and Equality

Let’s Begin

Evaluate Using Properties

Examples

1
Evaluate (12 – 8) + 3 (15 ÷ 5 – 2)
4
Name the property used in each step.

Substitution;
12 – 8 = 4
Substitution;
15 ÷ 5 = 3
Substitution;
3 – 2 = 1
Multiplicative
Identity; 3 • 1 = 3

Multiplicative
1
Inverse; • 4 = 1
4
= 4 Substitution; 1 + 3 = 4

Answer 4

Your Turn!

Evaluate Using Properties

1
Evaluate (10 – 7) + 4 (18 ÷ 9 – 1)
3

A. 4
B. 5
C. 1
D. 0

Answer

4