3178 cm² = 31 dm² 78 cm²

20 dm² 7 cm² = 2007 cm²

34 m² 27 dm² = 3427 dm²

5 m² 127 cm² = 50127 cm²

50 dm² 19 cm² = 5019 cm²

4,8m2x5=24m2.

ko chắc nữa....

\(625dm^2=6m^225dm^2\)

\(5m^2500cm^2=50500cm^2\)

12m275cm2= 12075cm2
625dm2= 6m25dm2
10260000cm2=100m26dm2
5m2500cm2=1000cm2

4,8 m² =.......480.......dm²

5m²   27dm²  = ..........5,27.........m²

Hok tốt !

4,8 m² = 480 dm²

5m² 27dm²=5,27 m²

Học tốt!!!

Kb nha^.^

4,8 \(m^2\)= 480 \(dm^2\)

5\(m^2\)27\(dm^2\)= 5,27 \(m^2\)

27dm² = 0,27 m² 

2,324 km² = 232,4 ha 

0,27 m²

232,4 ha

27dm²=0,27m²

2,324km²=232,4 ha

Bài 12:

\(15m^227dm^2=15,27m^2\\ 2cm^25mm^2=2,05cm^2\\ 34m^245cm^2=35,0045m^2\\ 7dm^230cm^2=7,3dm^2\)

Bài 13:

\(5dm^23cm^2=5,03dm^2\\ 12dm^2123mm^2=12,0123dm^2\\ 31dm^220mm^2=31,002dm^2\)

Bài 14:

\(4m25cm=4,25m\\ 12m8dm=12,8m\\ 26m8cm=26,08m\\ 248dm=24,8m\\ 36dm=3,6m\)

minh sua là 1/4ha =   m2

sua tiep la 1/10km2=     ha

\(\frac{1}{4}ha=2500m^2\)

\(\frac{1}{10}km^2=10ha\)

\(27dm^2=0,27m^2\)

\(15m^24dm^2=15,04m^2\)

\(2,324km^2=232,4ha\)

a,x = 5          b,6            c,4 000 000 005 m2

                                      6527 dm2

27dm2  49cm2 = 2749cm2

Tk mình nhé , ai tk mình mình tk lại 

27dm2 49cm2 = 2749 cm2

= 2749   cm2