1.   Which of the numbers is the solution of 3d = 12?
    A. 3 B. 6
    C. 4 D. 2
    Hint

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

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

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

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



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