1.   Solve 16 = k + 10 using mental math.
    A. 6 B. 8
    C. 9 D. 10
    Hint

  2.   Determine which equation is true by replacing the variable with 2.
    A. 6x + 2 = 10 B. 6x + 4 = 16
    C. 2x + 2 = 8 D. 6x = 8
    Hint

  3.   Solve 3 = 9 – n using mental math.
    A. 7 B. 3
    C. 9 D. 6
    Hint

  4.   Solve 24 = 2m mentally.
    A. 12 B. 22
    C. 4 D. 48
    Hint

  5.   For which equation is 5 the solution?
    A. 3 – x = 2 B. 5 + x = 5
    C. x + 3 = 5 D. x – 3 = 2
    Hint



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