CPM Homework Help : CC3 Problem 3-48

WHICH IS GREATER?

Write the algebraic expressions shown below. Use “legal” simplification moves to determine which expression in the Expression Comparison Mat is greater.

Shaded tile is plus 1. Tile is negative 1.

Hint (a):
Refer to the Math Notes box in Lesson 2.1.6.
Step 1 (a):
Remove zero pairs from each region of the mats.
Step 2 (a):
Find the value of each mat.
Left
$-3-1$
$-4$
Right
$-3-4$
$-7$
Answer (a):
$-4>-7$ The left Expression Comparison Mat is greater.

Hint (b):
See the hint in part (a).

Use the eTools below to help solve the problems.
Click the link at right for the full version of the eTool: 3-48a HW eTool

Click the link at right for the full version of the eTool: 3-48b HW eTool