1.   Find the result mentally using compensation.

877 − 299

    A. 1,176 B. 576
    C. 578 D. 668
    Hint

  2.   Find the result mentally.

7.3 + 5.5

    A. 12.8 B. 12.2
    C. 1.8 D. 35.8
    Hint

  3.   Find the result mentally.

12.4 − 7.1

    A. 5.5 B. 5.3
    C. 4.3 D. 19.5
    Hint

  4.   A cat weighs 8.2 pounds and a dog weighs 20.9 pounds. Find their total weight.
    A. 28.1 lb B. 28.7 lb
    C. 12.7 lb D. 29.1 lb
    Hint

  5.   Sum I = 56 + 29 and Sum II = 56 + 28. Which statement describes the two sums?
    A. Sum I is 29 greater than Sum II. B. Sum I is 1 less than Sum II.
    C. Sum I is 1 greater than Sum II. D. Sum II is 1 greater than Sum I.
    Hint