`a)` `5m 16cm=5,16m`        

`9dm4cm=0,94m`

`5hm20m=520m`

`3458cm=34,58m`

`13dm8mm=13,08dm`

`2m59dm=7,9m`

`35hm6dam=3,56km`

`35m6cm=3,506dam`

`3km7m=30,07hm`

`7m15cm=71,5dm`

`b)`

`4` `tấn` `5kg``= 4,005` `tấn`

`3` `tấn` `15kg` `=3,015` `tấn`

`5` `tạ` `20kg``=5,02` `tạ`

`3458kg``=34,58` `tạ`

`13kg` `5g` `=13,005` `kg`

`2dam^2` `59dm^2``=2,0059dam^2`

`3ha6m^2``=30006m^2`

`15m^2` `26cm^2=15,0026m^2`

`3km^2` `7m^2=3,00007km^2`

`7m^2`  `205cm^2``=7,0205m^2`

câu 1,

a) 5m16cm=5,16m5m16cm=5,16m

9dm4cm=0,94m9dm4cm=0,94m

5hm20m=520m5hm20m=520m

3458cm=34,58m3458cm=34,58m

13dm8mm=13,08dm13dm8mm=13,08dm

 

2m59dm=7,9m2m59dm=7,9m

35hm6dam=3,56km35hm6dam=3,56km

35m6cm=3,506dam35m6cm=3,506dam

3km7m=30,07hm3km7m=30,07hm

7m15cm=71,5dm7m15cm=71,5dm

b)

44 tấntấn 5kg5kg=4,005=4,005 tấn

33 tấntấn 15kg15kg =3,015=3,015 tấn

55 tạtạ 20kg20kg=5,02=5,02 tạ

3458kg3458kg=34,58=34,58 tạ

13kg13kg5g5g =13,005=13,005 kg

2dam22dam2 59dm259dm2=2,0059dam2=2,0059dam vuông

3ha6m23ha6m2=30006m2=30006m2

15m215m2 26cm2=15,0026m226cm2=15,0026m vuông

3km23km2 7m2=3,00007km27m2=3,00007km vuông

7m27m2  205cm2205cm2=7,0205m vuông .

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