Question

Thực hiện phép tính:

A= 7/14+5/15+10/60

Answer 1

Giải:

\(A=\dfrac{7}{14}+\dfrac{5}{15}+\dfrac{10}{60}\)

\(\Leftrightarrow A=\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{6}\)

\(\Leftrightarrow A=\dfrac{3}{6}+\dfrac{2}{6}+\dfrac{1}{6}\)

\(\Leftrightarrow A=\dfrac{3+2+1}{6}\)

\(\Leftrightarrow A=\dfrac{6}{6}=1\)

Vậy ...

Answer 2

\(A=\dfrac{7}{14}+\dfrac{5}{15}+\dfrac{10}{60}=\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{6}=\dfrac{3}{6}+\dfrac{2}{6}+\dfrac{1}{6}=\dfrac{6}{6}=1\)

Answer 3

A= \(\dfrac{7}{14}+\dfrac{5}{15}+\dfrac{10}{60}\)

= \(\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{6}\)

= \(\dfrac{3}{6}+\dfrac{2}{6}+\dfrac{1}{6}\)

= \(\dfrac{6}{6}\)= 1