Question

viết các hỗn số sau thành số thập phân

7 8/10                              52 65/100

815 229/1000

Answer 1

`7 8/10=(7xx10+8)/10=78/10=7,8`

`52 65/100=(52xx100+65)/100=5265/100=52,65`

`815 229/1000=(815xx1000+229)/1000=815229/1000=815,229`

Answer 2

\(7\dfrac{8}{10}=\dfrac{78}{10}=7,8\)

\(52\dfrac{56}{100}=\dfrac{5256}{100}=52,56\)

\(815\dfrac{229}{1000}=815,229\)

Answer 3

\(7\dfrac{8}{10}=\dfrac{78}{10}=7.8\)

\(52\dfrac{65}{100}=52\dfrac{13}{20}=\dfrac{1053}{20}=52.65\)

\(815\dfrac{229}{1000}=815.299\)

 

Answer 4

\(7\dfrac{8}{10}=\dfrac{78}{10}=7,8\)

\(52\dfrac{65}{100}=\dfrac{1053}{20}=52,65\)

\(815\dfrac{229}{1000}=\dfrac{815229}{1000}=815,229\)

Answer 5

78/10= 7,8
815 229/1000= 815,229

52 65/100=5,265