Sagot :
bonjour
1 ) 1 dm = 10 cm
2 ) 1 cm = 1 : 10 = 0.1 dm
3 ) 1 m = 10 dm
1 dm = 1 : 10 = 0.1 m
mm cm dm m dam hm km
1 mm 1 0.1 0.01 0.001 0.0001 0.00001 0.000001
1 cm 10 4 0.1 0.01 0.001 0.0001 0.00001
1 dm 100 10 1 0.1 0.01 0.001 0.000 1
1 m 1000 100 10 1 0.1 0.01 0.001
1 dam 10000 1000 100 10 1 0.1 0.01
1 hm 100000 10 000 1 000 100 10 0 0.1
1 km 1 000 000 100 000 10 000 1 000 100 10 1