Question

Giúp mik vs

Answer 1

Câu 4: 

a: \(A=\dfrac{-7}{19}\cdot\left(\dfrac{8}{11}+\dfrac{3}{11}\right)-\dfrac{12}{19}=\dfrac{-7}{19}-\dfrac{12}{19}=-1\)

b: \(C=\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot\dfrac{-4+3+1}{12}=0\)