Question

Answer 1

27

Answer 2

27

Answer 3

Điền số : 27

Answer 4

 \(\dfrac{45}{135}=\dfrac{9}{27}\) vì \(\dfrac{9\times5}{27\times5}=\dfrac{45}{135}\)

Answer 5

\(\dfrac{45}{135}\)=\(\dfrac{45:5}{135:4}\)=\(\dfrac{9}{27}\)