1.   Find the sum.

6 + 6 + 6 = __

    A. 6 B. 24
    C. 666 D. 18
    Hint

  2.   Find the missing numbers.

3, 6, 9, __ , __ , 18

    A. 15; 21 B. 12; 16
    C. 12; 15 D. 10; 15
    Hint

  3.   Find the missing numbers.

10, 20, 30, __ , __

    A. 50; 70 B. 40; 50
    C. 31; 32 D. 40; 41
    Hint

  4.   Find the missing numbers.

__ , 4, 6,__ , 10, 12

    A. 3; 9 B. 1; 7
    C. 2; 14 D. 2; 8
    Hint

  5.   Write an addition sentence.
   
    A. 8 + 8 = 24 B. 8 + 8 + 8 = 16
    C. 8 + 8 = 16 D. 8 + 8 + 8 = 24
    Hint