

1. 
The equation x + 3 = 5 is modeled below. To solve this problem using the model, what should you do first? 





A. 
Remove 3 positive counters from each side of the mat. 


B. 
Add 5 negative counters to the left side of the mat. 


C. 
Remove 5 positive counters from the right side of the mat. 


D. 
Add 3 positive counters to each side of the mat. 


Hint 


2. 
Solve x + 3.57 = 6.87. 


A. 
2.43 
B. 
3.20 


C. 
10.44 
D. 
3.30 


Hint 


3. 
The sum of the measures of the angles of a triangle is 180°. Find the missing measure. 





A. 
80 
B. 
100 


C. 
90 
D. 
75 


Hint 


4. 
Solve x + 9 = 11. 


A. 
2 
B. 
2 


C. 
11 
D. 
9 


Hint 


5. 
Solve 3.2 + y = 8.7. 


A. 
3.2 
B. 
8.7 


C. 
5.5 
D. 
11.9 


Hint 


