Bài 4:
`\frac{1}{2}` = 1 : 2 = 0,5
`\frac{7}{4}` = 7 : 4 = 1,75
`\frac{9}{5}` = 9 : 5 = 1,8
`\frac{11}{25}` = 11 : 25 = 0,44
Bài 5:
`\frac{3}{20}` = `\frac{3 x 5}{20 x 5}` = `\frac{15}{100}`
`\frac{27}{300}` = `\frac{27:3}{300:3}` = `\frac{9}{100}`
`\frac{400}{1000}` = `\frac{400:10}{1000:10}` = `\frac{40}{100}`
`\frac{500}{10000}` = `\frac{500:100}{10000:100}` = `\frac{5}{100}`
- Answered by Meett1605
