Chú ý : Khi đo diện tích ruộng đất người ta còn dùng đơn vị héc-ta (ha)

1ha = 10000 m 2

nbbvbbv

37 km2 06 hm2=...hm2

a) 7cm² 18mm²= 718 mm²

b)  810 ha = 8km²1000dam²

c) 49000dam²=4km²90ha

d) 9m² 35 cm²= 935 cm²

e) 11 ha 150m²= 110 150m²

f) 703 cm²=7dm²3cm²

$a)$

$\circ 1m^2=100d{m}^2=10000c{m}^2=1000000m{m}^2$

GT: $1m^2=100d{m}^2$

$1d{m}^2=100c{m}^2$

$1c{m}^2=100m{m}^2$

$\circ 1ha=10000m^2$

$\circ 1k{m}^2=100ha=1000000m^2$

$b)$

$\circ 1m^2=0,01da{m}^2$

$\circ 1ha=0,01k{m}^2$

$\circ 1m^2=0,0001h{m}^2=0,0001ha$

GT: $h{m}^2=ha$

$\circ 4ha=0,04k{m}^2$

GT: $1ha=0,01k{m}^2$

$\circ 1m^2=0,000001k{m}^2$

a, 1m² = 100 dm² = 10000 cm² = 1000000 mmm²

   1ha = 10000 m² 

   1km² = 100 ha = 1000000m²

b, 1m² = \(\dfrac{1}{100}\) dam²

    1m² = \(\dfrac{1}{10000}\) hm² = \(\dfrac{1}{10000}\)ha

      1m² = \(\dfrac{1}{1000000}\)km²

         4ha = \(\dfrac{4}{100}\)km² = \(\dfrac{1}{25}\)km²

\(8m^226dm^2=8,26m^2\)

\(20m^24dm^2=2004dm^2\)

\(45dm^2=0,45m^2\)

\(7m^27dm^2=70700cm^2\)

\(4cm^27mm^2=407mm^2\)

\(5dm^29cm^2=509cm^2\)

\(\frac{1}{2}ha=5000m^2\)

câu cuối hình như đề sai!

8m² 26dm²=8,26m²

20m² 4dm²= 2040dm²

45dm²=0,45m²

7m² 7dm²=707000cm²

4cm 7mm²=40,7mm²

5dm² 9cm²= 50,9cm²

1/2 ha =50000 m²

1/5 kg=20000dam²

đúng thì k cho mik nha

Bổ sung câu cuối,lúc nãy mình nhìn nhầm!

\(\frac{1}{5}km^2=20000dam^2\)

7,6 hm2 = ..... dam2

0,17 dam2 = ...... m2

8,9 hm2 = ..... dam2

0,21 hm2 = ..21.... dam2

15,2 m2 = ...1520.. dm2

1,107 dm2 = ...11070.. mm2

0,321 dm2 = ..32,1... cm2

1,9 m2 = ...190.. dm2

0,821 km2 = ...8210... dam2

\(1m^2=100dm^2\)
\(1m^2=10000cm^2\)
\(1m^2=1000000mm^2\)
\(1m^2=0,01dam^2\)
\(1m^2=0,0001hm^2\)
\(1m^2=0,000001km^2\)

100dm2 

^10000cm2

0,01dam2

0,0001hm2

0,000001km2

1m2=100dm2

1m2=10000cm2

1m2=1000000mm2

1m2=****dam2

1m2=****hm2

1m2=*****km2

20 dam=?hc

a)\(\frac{2}{5}dam^2=40m^2\)

\(\frac{3}{4}hm^2=7500m^2\)

\(\frac{5}{8}km^2=625000m^2\)

b)\(\frac{2}{5}m^2=40dm^2\)

\(\frac{3}{4}m^2=7500cm^2\)

\(\frac{5}{8}m^2=625000mm^2\)

#Y/n

6015m

2yến58kg

60hm 15m=6015.m

87dm=.8.hm7dm

258kg=20.yen58.kg

137hm2=.........km2........m2

7hm2 7m2=.......m2

324cm2=.....dm2..............cm2

4750m2=.....dam2.....m2

247mm2=.....cm2.....mm2

tự tra trong sách đi

a) 0,00356
b) 17,08
c) 0,14
d) 4,07
e) 90
f) 53200
g) 79,85
h) 1,2305

a: =0,0356

b: =17,08

c: =0,14

d: =4,07

e: =90

f: =53200

g: =79,85

h: =1,2305

TỰ LÀM ĐI DÀI LẮM

Cho hỏi là 236901=.................m2.................dm2 vậy ạ