Question

2 cách

Answer 1

`@Neo`

Answer 2

\(=\dfrac{3}{4}+\dfrac{3}{4}\cdot29+\dfrac{3}{4}\cdot30+\dfrac{3}{4}\cdot40\)

\(=\dfrac{3}{4}\left(1+29+30+40\right)=\dfrac{3}{4}\cdot100=75\)

Answer 3

=0,75 nhân 1 +0,75 nhân 29+0.75 nhân 30+0.75 nhân 40=0,75 nhân(1+29+30+40)=0,75 nhân 100=75