Câu 10: (0,5đ) Kết quả khi rút gọn \(\dfrac{8.5-8.2}{16}\) là:
A. \(\dfrac{5-16}{2}=\dfrac{11}{2}\) B.\(\dfrac{40-2}{2}=\dfrac{38}{2}=19\)
C.\(\dfrac{40-16}{16}=40\) D.\(\dfrac{8.\left(5-2\right)}{16}=\dfrac{3}{2}\)
11.Kết quả của phép trừ \(\dfrac{1}{27}-\dfrac{1}{9}\) là
A.=\(\dfrac{0}{18}\) B.=\(\dfrac{1-3}{27}=\dfrac{-2}{27}\)
C.\(\dfrac{2}{27}\) D.=\(\dfrac{5}{4}\)