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



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