Question

Cách làm là gì ạ

Answer 1

\(0.25+\dfrac{3}{5}-\left(\dfrac{1}{8}-\dfrac{2}{5}+1\dfrac{1}{4}\right)\)

\(=\dfrac{1}{4}+\dfrac{3}{5}-\dfrac{1}{8}+\dfrac{2}{5}-1-\dfrac{1}{4}\)

\(=-\dfrac{1}{8}\)

Answer 2

0,25 + \(\dfrac{3}{5}-\left(\dfrac{1}{8}-\dfrac{2}{5}+1\dfrac{1}{4}\right)\)

= 0,25 + \(\dfrac{3}{5}-\dfrac{39}{40}\)

= \(\dfrac{10}{40}+\dfrac{24}{40}-\dfrac{39}{40}\)

= \(\dfrac{10+24-39}{40}\)

= \(\dfrac{-5}{40}=\dfrac{-1}{8}\)