Question

 

Answer 1

các bạn ơi giúp mình với

 

Answer 2

`9/25. 5/8+9/23. 3/8-9/23`
`=9/40+9/23(3/8-1)`
`=9/40+9/23.(-5/8)`
`=9/40-45/184`
`=-9/460`

Answer 3

9/25*5/8+9/23*3/8-9/23

=9/25*5/8+9/23(3/8-1)

=9/25*5/8+9/23*(-5/8)

=9/25*8/8+(-9/23)*5/8

=5/8(9/25+(-9/23))

=5/8*18/175

=9/140

Answer 4

\(\dfrac{9}{25}.\dfrac{5}{8}+\dfrac{9}{23}.\dfrac{3}{8}-\dfrac{9}{23}\)

\(=\dfrac{9}{40} +\dfrac{9}{23}.\left(\dfrac{3}{8}-1\right)\)

\(=\dfrac{9}{40}+\dfrac{9}{23}.\left(-\dfrac{5}{8}\right)\)

\(=\dfrac{9}{40}-\dfrac{45}{184}\)

\(=\dfrac{-9}{460}\)

 

Answer 5

\(\dfrac{9}{25}.\dfrac{5}{8}+\dfrac{9}{23}.\dfrac{3}{8}-\dfrac{9}{23}\) 

\(=\dfrac{9}{25}.\dfrac{5}{8}+\dfrac{9}{23}.\left(\dfrac{3}{8}-1\right)\) 

\(=\dfrac{9}{25}.\dfrac{5}{8}+\dfrac{9}{23}.\dfrac{-5}{8}\) 

\(=\dfrac{9}{25}.\dfrac{5}{8}+\dfrac{-9}{23}.\dfrac{5}{8}\) 

\(=\dfrac{5}{8}.\left(\dfrac{9}{25}+\dfrac{-9}{23}\right)\) 

\(=\dfrac{5}{8}.\dfrac{-18}{175}\) 

\(=\dfrac{-9}{140}\)

Answer 6

-9/460