Explicație pas cu pas:
a) 1m = 10 dm
4dm +6dm= 10dm
1m= 1000mm
770mm + 230mm =1000mm
b) 1m=10 dm
9dm +1dm =10 dm
1m=100cm
80cm+ 20cm= 100cm
c) 6m= 60dm
300cm= 30dm
60dm+ 10dm+30dm= 100dm
10cm =1 dm
2000mm= 20dm
9dm+1dm+20dm= 30dm= 3m
