Question

Answer 1

Bài 21:

a) 1/4 ; 2/4 ; 3/4

b) 2/3 ; 2/5 ; 2/4

c) 3/10 ; 3/100 ; 3/1000

Bài 22:

1/2 = 5/10                        7/4 = 175/100

9/5 = 18/10                       11/25 = 44/100

Bài 23: 

3/20 = 15/100                    27/300 = 9/100                  400/1000 = 40/100

Answer 2

21)

a) \(\dfrac{2}{3}\);\(\dfrac{5}{3}\);\(\dfrac{7}{3}\)

b) \(\dfrac{2}{7}\);\(\dfrac{3}{7}\);\(\dfrac{5}{7}\)

c) \(\dfrac{20}{40}\);\(\dfrac{2}{4}\);\(\dfrac{4}{8}\)

22)

\(\dfrac{1}{2}\)=0,5

\(\dfrac{7}{4}\)=1,75

\(\dfrac{9}{5}\)=1,8

\(\dfrac{11}{25}\)=0,44