Question

Answer 1

Hi vọng có bạn giúp

Answer 2

\(a.\dfrac{23}{29}+\dfrac{5}{11}+\dfrac{17}{11}+\dfrac{6}{29}\\ =\left(\dfrac{23}{29}+\dfrac{6}{29}\right)\left(\dfrac{5}{11}+\dfrac{17}{11}\right)\\ =1+2=3\)

\(b.\dfrac{5}{11}+\dfrac{19}{25}+\dfrac{6}{11}+\dfrac{6}{25}\\ =\left(\dfrac{5}{11}+\dfrac{6}{11}\right)+\left(\dfrac{19}{25}+\dfrac{6}{25}\right)\\ =1+1=2\)

Answer 3

2/

a) \(\dfrac{23}{29}+\dfrac{5}{11}+\dfrac{17}{11}+\dfrac{6}{29}=\left(\dfrac{5}{11}+\dfrac{17}{11}\right)+\left(\dfrac{23}{29}+\dfrac{6}{29}\right)=\dfrac{22}{11}+\dfrac{29}{29}=2+1=3\)

b) \(\dfrac{5}{11}+\dfrac{19}{25}+\dfrac{6}{11}+\dfrac{6}{25}=\left(\dfrac{5}{11}+\dfrac{6}{11}\right)+\left(\dfrac{19}{25}+\dfrac{6}{25}\right)=\dfrac{11}{11}+\dfrac{25}{25}=1+1=2\)

 

Answer 4

b.511+1925+611+625=(511+611)+(1925+625)=1+1=2