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Efectuează operatiile: a)12 hm-3.200 cm+730 dam=?m ; b) 130 hm+12.000 m-800 dam=?km ;c)13.000 mm+79 hm-480 dm=?m; d)31 km+45 hm-700 m= ? dam
HELP CA MA OMOARA DOAMNA!


Răspuns :

a)12hm-3200cm+730dam=8468m
1200m-32m+7300=8468m
1168m+7300=8468m

b)130hm+12000m-800dam=17km
13km+12km-8km=17km

c)13000mm+79hm-480dm=7865m
13m+7900m-48m=7865m
7913-48= 7865 m

d)31km+45hm-700m=3480dam
3100dam+450dam-70dam=3480dam
3550-70=3480dam