Răspuns :
a) 180dam+320 dam=500 dam=5 000 m b) 4m=40 dm 40dm+32dm=72 dm 1 000m=100 dam 100dam-50dam=50 dam 30 dm=3 m 42m-3m=39 m 6*250dam=1 500dam=150 hm 6*220dm=1320dm=132 m c) 17dm=170cm 170cm+19cm=189cm 70 cm=7 dm 415dm+7dm=422dm 80:2mm=40mm=4 cm 2) 50m=500dm iar p=4l p=4*500dm p=2 000 dm