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Calculati: 64°40':2-6°30'×3=​

Răspuns :

64°40' : 2 = 32°20'

6°30' x 3 = 18°90'=19°30'

32°20'-19°30'=31°80' - 19°30' = 12°50'

64°40':2-6°30'×3 =

= 3880' : 2 - 390' × 3 =

= 1940' - 1170' =

= 770' =

= 12° 50' cam asa cred