Chú ý:

1m=100cm

1cm=0,01m

1cm=0,1dm

1m=0,001km

1mm=0,001m

1km=1000m

1dam=10m

5m 7cm=5+7*0,01=5,07m

25m 14cm= 25+14*0,01=25,14m

54cm=54*0,1=5,4 dm

74dm 6cm= 74+6*0,1=74,6dm

3cm 6mm=3*0,1+6*0,01=0,36 dm

4km 653m= 4+653*0,001=4,653km

14km 73m= 14+73*0,001=14,073 km

347m= 347*0,001=0,347km

5km 4dam= 5*1000+4*10=5040m

201mm=201*0,001=0,201m

#Crunchy

 

Đáp án:

 

Giải thích các bước giải:

 5m 7cm = 5,07m ( 5m + 0,07m = 5,07m) 

25m 14cm = 25,14m ( 25m + 0,14 m = 25,14m ) 

54 cm = 5,4 dm ( 54cm : 10 = 5,4dm vì 1 cm = 1/10 dm )

74dm 6cm = 74,6 dm ( 74 dm + 0,6 dm = 74,6 dm) 

3 cm 6mm = 0,36dm ( 3cm 6mm = 36mm = 0,36dm)

4km 653m = 4,653km ( 4km 653m = 4km + 0,653km = 4,653km )

14km 73 m = 14,073 km ( 14km 73m = 14km + 0,073km = 14,073km )

374m = 0,374 km ( 374m : 1000 = 0,374km vì 1m = 1/000km ) 

5km 4dam = 5040 m ( 5km 4dam = 500dam + 4dam = 504dam = 5040m) 

201mm = 0,201 m ( 201mm : 1000 = 0,201 m vì 1mm = 1/1000 m )