Question

Tính nhanh:

a) \(\frac{-11}{23}\). \(\frac{6}{7}\) + \(\frac{8}{7}\). \(\frac{-11}{23}\)- \(\frac{1}{23}\)

Answer 1

=-11/23x(6/7+8/7)-1/23

=-11/23x2-1/23

=-22/23-1/23

=-1

Answer 2

\(\frac{-11}{23}.\frac{6}{7}+\frac{8}{7}.\frac{-11}{23}-\frac{1}{23}\)=\(\frac{-11}{23}.\left(\frac{6}{7}+\frac{8}{7}\right)-\frac{1}{23}\)=\(\frac{-11}{23}.2-\frac{1}{23}\)=\(\frac{-22}{23}-\frac{1}{23}=\frac{-21}{23}\)

Answer 3

bạn Nguyễn Thu Dương sai ở chỗ -22/23-1/23=-22/23+-1/23 chứ

Answer 4

=-11/23(6/7+8/7)-1/23

=-11/23.2-1/23

=-22/23-1/23=-22/23+-1/23

=-1