Read the Math Notes box above and for Lesson 2.1.2. 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 ✎
Choose from among the properties below:
When adding three or more numbers or terms together, grouping is not important.
Adding zero to any expression gives the same expression.
Commutative Property of Addition: When adding two or more numbers or terms together, order is not important.