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cum pot calcula 60grade20'- 40grade45'?​

Răspuns :

Răspuns:

60°20'-40°45'=59°80'-40°45'=19°35'

Am adaugat 60' la 20' ca sa putem face scaderea

60g20'-
40g45'
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19g35' transformai 60g20' in 59g80'
iar dupa aceea le scazi normal