Question

Ai biết giúp mik vs. 

Answer 1

bỏ ngoặc rồi tính

Answer 2

= 8\(\dfrac{5}{11}\)+ 19\(\dfrac{4}{13}\)- 9\(\dfrac{4}{13}\)+7\(\dfrac{6}{11}\)

=(8\(\dfrac{5}{11}\)+7\(\dfrac{6}{11}\))- (19\(\dfrac{4}{13}\)- 9\(\dfrac{4}{13}\))= 16- 10= 6

Answer 3

\(\left(8\dfrac{5}{11}+19\dfrac{4}{13}\right)-\left(9\dfrac{4}{13}-7\dfrac{6}{11}\right)\)

=\(\dfrac{93}{11}+\dfrac{251}{13}-\dfrac{121}{13}+\dfrac{83}{11}\) 

=\(\left(\dfrac{93}{11}+\dfrac{83}{11}\right)+\left(\dfrac{251}{13}-\dfrac{121}{13}\right)\) 

=\(16+10\) 

=26

Answer 4