Question

3/4 x 4/5 + 4 5 x 1/4 tính bằng cách thuận tiện nhất

Answer 1

3/4 . 4/5 + 4/5 . 1/4 
= (3/4 + 1/4) . 4/5 
= 1 . 4/5 
= 4/5 

Answer 2

= 4/5 x ( 3/4 + 1/4 )

= 4/5 x 1

=4/5

Answer 3

3/4 x 4/5 + 45 x 1/4 

\(=\left(\dfrac{3}{4}+\dfrac{1}{4}\right)\times\dfrac{4}{5}=1\times\dfrac{4}{5}=\dfrac{4}{5}\)

 

Answer 4

\(\dfrac{3}{4}\times\dfrac{4}{5}+\dfrac{4}{5}\times\dfrac{1}{4}=\left(\dfrac{3}{4}+\dfrac{1}{4}\right)\times\dfrac{4}{5}=1\times\dfrac{4}{5}=\dfrac{4}{5}\)

Answer 5

=4/5