8. What operations are needed to solve the problem? A. Addition and subtraction
B. Subtraction and division
C. Subtraction and multiplication
D. Addition and division
9. What is the mathematical sentence?
A. 28 + (12 x 8 4/5) = n
C. (28 x 8 4/5 ) 12 = n
B. (28-84/5 ) - 12 = n
D. 28 - (8 4/5 +12) = n
10. What is the answer to the problem?
A. 1/8 hours
B. 2 hours
C. 1 11/15 hours
D. 3 2/3 hours