\(3\frac{127}{1000}=\frac{3.1000+127}{1000}=\frac{3127}{1000}\)

\(3\frac{127}{1000}=\frac{3\times1000+127}{1000}=\frac{3127}{1000}.\)

\(a,\frac{127}{10}=12,7\)
\(b,\frac{65}{100}=0,65\)
\(c,\frac{2005}{1000}=2,005\)
\(d,\frac{8}{1000}=0,008\)

sfgdgwrtw4

127/10=12.7

65/100=0.65

2005/1000=2.005

8/1000=0.008

8,2

36,23

54,07

12,254

☺☻

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

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

1)

1,25 tấn = 1 tấn 250 kg

8 m² 50 cm² = 8,005 m²

0,68 km = 680 m

420 dam² = 4,2 ha

2)

7/14 = 0,5

51% = 51/100 = 0,51

5 1/2 = 5 + 1/2 = 5,5

55/1000 = 0,055

3)

a) 74,15 + 4,05 : 2,5

= 74,15 + 1,62

= 75,77

b) 100 - 2,6 × 3,9 + 20,97

= 100 - 10,14 + 20,97

= 89,86 + 20,97

= 110,83

b và c

1-b,2-c

1-b,2-c

Giải:

\(\frac{127}{10}=12,7\)

\(\frac{65}{100}=0,65\)

\(\frac{2005}{1000}=0,2005\)

\(\frac{8}{1000}=0,008\)

12,7

0,65

0,2005

0,008

127/10= 12,7

65/100= 0,65

2005/1000= 2,05

8/1000=0,008

k  cho minh neu dung

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

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

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

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

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

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

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

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

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

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