Question

Giúp 

Answer 1

a) = (\(\dfrac{22}{5}+\dfrac{17}{7})-(\dfrac{12}{5}-\dfrac{39}{7})\) 

= \((\dfrac{22}{5}+\dfrac{12}{5})-(\dfrac{17}{7}-\dfrac{39}{7})\)

= \(\dfrac{34}{5}+\dfrac{22}{7}\)

= \(\dfrac{238}{35}+\dfrac{110}{35}=\dfrac{348}{35}\)

b= \((\dfrac{43}{4}+\dfrac{19}{5})-(\dfrac{23}{4}-\dfrac{6}{5})\) 

= \((\dfrac{43}{4}+\dfrac{23}{4})-(\dfrac{19}{5}-\dfrac{6}{5})\) 

= \(\dfrac{33}{2}+\dfrac{13}{5}\) 

= \(\dfrac{65}{10}+\dfrac{26}{10} = \dfrac{81}{10}\)