Question

\(\dfrac{5}{9}x\dfrac{5}{11}+\dfrac{5}{11}x\dfrac{4}{9}\)

giúp mik với

Answer 1

 

5 9x511+511x49

=5/11 x (5/9+4/9)

=5/11 x 1

=5/11

Answer 2

5/9 x 5/11 + 5/11 x 4/9 

= (5/9 x 5/11)  +    ( 4/9 x 5/11 )

=    25/99         +         20/99

=           45/99   = 5/11

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Answer 3

\(\dfrac{5}{9}\times\dfrac{5}{11}+\dfrac{5}{11}\times\dfrac{4}{9}\)

\(=\dfrac{5}{11}\times\left(\dfrac{5}{9}+\dfrac{4}{9}\right)\)

\(=\dfrac{5}{11}\times1\)

\(=\dfrac{5}{11}\)

Answer 4

\(=\dfrac{5}{11}\)