15 m2 = 1500 dm2 

3 m2 42 dm2 = 342 dm2 

7 km2 528 m2 = 7 000 528 m2 

102 m2 = 1 020 000 cm2 

k cho mk nha mk ít điểm lắm !

\(15m^2=1500dm^2\)

\(3m^242dm^2=342dm^2\)

\(7km^2528m^2=700528m^2\)

\(102m^2=1020000cm^2\)

15m2 = 1500dm2

3m2 42dm2= 342dm2

7km2 528m2= 7000528m2

102m2= 1020000cm2

tk mik nhá bn

7km2 = ........`7` `000` `000`............. m2

b) 6000000m2 = ..........`6`.......... km2

40km2 = .......`40` `000` `000` ............. m2

250dm2 = ......`25000`....................cm2

247600cm2 = ..........`2476`... dm2

10m2 = ................`100` `000`............ cm2

a) 7000000 b) 6
c) 40000000 
d) 25000 
e) 2476
h) 100000

7km² = 7 000 000 m²

b) 6000000m² =  km²

40km² =    m²

250dm² = cm²

247600cm² =  dm²

10m² = 000

\(1m^2=100dm^2\)

\(630dm^2=63000cm^2\)

\(1km^2=1000000m^2\)

\(50000000m^2=50km^2\)

\(15km^2=15000000m^2\)

\(7km^2=7000000m^2\)

1 cm² = 0.01 dm²                                    21 mm² = 0.000021 m²

17 cm² = 1700 mm²                                 7 km² 5 hm² = 70500 dam²

2100mm² = 21 cm²                                  2 m² 12 cm² = 20012 cm²

45 cm² = 0.45 dm²                                   34 dm² = 0.34 m²

347 dm² = 34700 cm²                                 90 m² 200 cm² = 9002 dm²

1cm2.......dm2

1

4km2 = 4000000 m2  ; 20m2 = 2000 dm2 :  5m2 = 50000 cm2  : 2000000 m2= 2 km2 : 53m2 18m2 = 7100 dm2

ghi đến bài 1 thôi ..đủ liệt rồi

m.n giúp tiếp nhé

700000000m2

7km2 650m2=   m2

\(7km^25hm^2=70500dam^2\)

\(7km^25hm^2=\left(7\times10000\right)+\left(5\times100\right)=70500dam^2.\)