Question

[Lan Anh Ngô]

5/12 + 1/2 +2/3 +3/4 

1/6 + 5/6 + 1 và 1/3

Answer 1

[HT.Phong (9A5)]

\(\dfrac{5}{12}+\dfrac{1}{2}+\dfrac{2}{3}+\dfrac{3}{4}\)

\(=\dfrac{5}{12}+\dfrac{6}{12}+\dfrac{8}{12}+\dfrac{9}{12}\)

\(=\dfrac{5+6+8+9}{12}\)

\(=\dfrac{28}{12}\)

\(=\dfrac{7}{3}\)

________________

\(\dfrac{1}{6}+\dfrac{5}{6}+1\dfrac{1}{3}\)

\(=\dfrac{6}{6}+\dfrac{4}{3}\)

\(=1+\dfrac{4}{3}\)

\(=\dfrac{7}{3}\)