8\(\frac{1}{14}\)-6\(\frac{3}{7}\)
C1:8\(\frac{1}{14}\)-6\(\frac{6}{14}\)
=2\(\frac{-5}{14}\)
Ta có hỗn số này : 8\(\frac{1}{3}\)-\(6\frac{3}{7}\)
C1:\(\frac{25}{3}\)-\(\frac{45}{7}\)
=\(\frac{175}{21}\)-\(\frac{135}{21}\)
=\(\frac{40}{21}\)=\(1\frac{19}{21}\)
xin lỗi nha đề bài phải là:
8 1/14-6 3/7
C2:8\(\frac{1}{14}\)-6\(\frac{3}{7}\)
=\(\frac{113}{14}\)-\(\frac{45}{7}\)
=113/14-90/14
=\(\frac{23}{14}\)