Home > CC3 > Chapter 2 > Lesson 2.1.7 > Problem 2-68
2-68.
Read the Math Notes boxes in this lesson and for Lesson 2.1.5. Then examine the work below that shows one way to simplify the expression 3x + 8 + (x +10). Decide which property was used for each step. Homework Help ✎
Expression | What property was used? |
Original expression | |
a. | |
b. | |
Added like terms | |
c. | |
Added like terms |
What is the property used to rearrange parentheses with addition?
In part (b), some terms are moved. Why is this a legal move?
The answers are filled in below.
Expression | What property was used? |
Original expression | |
(a). Associative Property of Addition | |
(b). Commutative Property | |
Added like terms | |
(c). Associative Property of Addition | |
Added like terms |