Bài 1: \(\frac{7}{6}-\frac{15}{9}=\frac{7}{6}-\frac{5}{3}=\frac{7}{6}-\frac{10}{6}=-\frac{3}{6}=-\frac{1}{2}\)
Bài 2:\(\frac{1}{2}=\frac{1}{3}+\frac{1}{6}\)
Bài 1
7/6 - 15/9 =7/6 - 5/3= -1/2
bài 2
1/2= 1/5 + 3/10
Bài 1
\(^{\frac{7}{6}-\frac{15}{9}=\frac{7}{6}-\frac{5}{3}=\frac{7}{6}-\frac{10}{6}=\frac{-3}{6}=\frac{-1}{2}}\)
Bài 2:
\(^{\frac{1}{2}=\frac{3}{6}=\frac{1}{6}+\frac{2}{6}=\frac{1}{6}+\frac{1}{3}}\)