Question

Answer 1

lớp 3 =)

Answer 2

hảo lớp 3 có %

Answer 3

\(=\dfrac{3}{4}+\dfrac{3}{4}\cdot29+\dfrac{3}{4}\cdot30+\dfrac{3}{4}\cdot40\\ =\dfrac{3}{4}\cdot\left(1+29+30+40\right)\\ =\dfrac{3}{4}\cdot100=\dfrac{300}{4}=75\)

Answer 4

Bài 6 :

75 / 100 + 3/4 x 29 + 75% x 30 + 0,75 x 40

= 75 / 100 + 75 / 100 x 29 + 75 / 100 x 30 + 75 / 100 x 40

= 75 / 100 x ( 29 + 30 + 40 + 1 )

= 0,75 x 100

= 75