\(23\dfrac{6}{1000}=\dfrac{23\times1000+6}{1000}=\dfrac{23006}{1000}=\dfrac{11503}{500}\)

 \(23\dfrac{6}{1000}=23+\dfrac{6}{1000}=23+0,006=23,006\)

b và c

1-b,2-c

\(\dfrac{54}{10}=5,4\)

\(4\dfrac{78}{1000}=4+\dfrac{78}{1000}=4+0,078=4,078\)

\(18\dfrac{4}{100}=18+\dfrac{4}{100}=18+0,04=18,04\)

\(\dfrac{1990}{10000}=\dfrac{199}{1000}=0,199\)

\(\dfrac{54}{10}=\dfrac{27}{5}=5,4\)

\(4\dfrac{78}{1000}=\dfrac{39}{125}=0,312\)

\(18\dfrac{4}{100}=\dfrac{18}{25}=0,72\)

\(\dfrac{1990}{10000}=\dfrac{199}{1000}=0,199\)

5410=5,41054​=5,4

4781000=4+781000=4+0,078=4,0784100078​=4+100078​=4+0,078=4,078

184100=18+4100=18+0,04=18,04181004​=18+1004​=18+0,04=18,04

199010000=1991000=0,199100001990​=1000199​=0,199

đây nè

\(3,8=3\frac{8}{10};7,54=7\frac{54}{100};16,35=16\frac{35}{100};35,576=35\frac{576}{1000}\)

\(\frac{73}{10}=7\frac{3}{10}=7,3;\frac{86}{100}=0,86;\frac{5375}{1000}=5\frac{375}{1000}=5,375;\frac{673}{1000}=0,673;\frac{9356}{10000}=0,9356\)

lm ko ai tick nên thôi 

\(3\dfrac{5}{10}=\dfrac{35}{10}=\dfrac{7}{2}=3,5\)

\(12\dfrac{5}{100}=\dfrac{241}{20}=12,05\)

\(17\dfrac{23}{100}=\dfrac{1723}{100}=17,23\)

\(10\dfrac{7}{10}=\dfrac{107}{10}=10,7\)

3\(\dfrac{5}{10}\)=3,5;12\(\dfrac{5}{100}\)=12,05;17\(\dfrac{23}{100}\)=17,23;10\(\dfrac{7}{10}\)=10,7.

35/10, 1205/100,1723/100,107/10

a) \(10\frac{7}{10}=\frac{107}{10}=10,7\)

b) \(5\frac{15}{100}=\frac{515}{100}=5,15\)

c) \(34\frac{3}{100}=\frac{3403}{100}=34,03\)

d) \(68\frac{136}{1000}=\frac{68136}{1000}=68,136\)

e) \(5\frac{5}{1000}=\frac{5005}{1000}=5,005\)

g) \(100\frac{1}{100}=\frac{10001}{100}=100,01\)

Ta có :

\(2\frac{17}{1000}\)

Phải đổi hỗn số trên ra số thập phân . 

Ta tóm gọn 

\(\frac{17}{1000}=0,017\)2 không cần đổi

\(2\frac{17}{1000}\)= 2 + 0,017 = 2,017

8,2

36,23

54,07

12,254

☺☻