1.   The equation x + 3 = 5 is modeled below. To solve this problem using the model, what should you do first?
   
    A. Remove 5 positive counters from the right side of the mat.
    B. Add 5 negative counters to the left side of the mat.
    C. Remove 3 positive counters from each side of the mat.
    D. Add 3 positive counters to each side of the mat.
    Hint

  2.   Solve w + 3 = 11.
    A. 8 B. 7
    C. 14 D. 9
    Hint

  3.   Solve x + 3.57 = 6.87.
    A. 3.30 B. 10.44
    C. 2.43 D. 3.20
    Hint

  4.   The sum of the measures of the angles of a triangle is 180. Find the missing measure.
   
    A. 75 B. 80
    C. 90 D. 100
    Hint

  5.   Solve x + 9 = 11.
    A. 11 B. -2
    C. 9 D. 2
    Hint



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