A.fff\(\frac{2}{3}\)/fff× 33 – 12
B.fff\(\frac{3}{2}\)/fff× 51 – 24
C.33-22×fff\(1\frac{1}{2}\)/fff
D.51 ÷ (17 × 3) + 9
E.(51 ÷ 17) × 3 + 9
我的答案: