Bài 2:
5/6=1/2+1/3
Bài 1:
=9/18+6/18+10/18
=25/18
Bài \(1\)
\(\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{5}{9}\)
\(=\dfrac{3}{6}+\dfrac{2}{6}+\dfrac{5}{9}\)
\(=\dfrac{5}{6}+\dfrac{5}{9}\)
\(=\dfrac{45}{54}+\dfrac{30}{54}\)
\(=\dfrac{25}{18}\)
Bài \(2\)
\(\dfrac{2}{3}+\dfrac{1}{6}=\dfrac{5}{6}\)