Question

Answer 1

a: \(\dfrac{25}{12}\cdot0,8+\dfrac{25}{12}\cdot0,5\)

\(=\dfrac{25}{12}\left(0,8+0,5\right)\)

=>Chọn dấu "="

b: \(\dfrac{37}{63}:5+\dfrac{37}{63}:14=\dfrac{37}{63}\cdot\dfrac{1}{5}+\dfrac{37}{63}\cdot\dfrac{1}{14}=\dfrac{37}{63}\left(\dfrac{1}{5}+\dfrac{1}{14}\right)=\dfrac{37}{63}\cdot\dfrac{19}{70}\)

\(\dfrac{37}{63}:\left(5+14\right)=\dfrac{37}{63}:19=\dfrac{37}{63}\cdot\dfrac{1}{19}\)

mà 19/70>1/19

nên điền dấu ">"