Tolong bantu darurat

1)
a) 7° = 7 × 60' = 420'
b) 12' = 12 × 60" = 720"
c) 25° 80' = 26° 20'
=> (80' = 60' + 20' = 1° 20')

2)
24° 46' + 57° 35' = ..... ?
24° 46'
57° 35'
------------ +
81° 81'
=> 81° 81' = 81° + (60' + 21')
..................= 81° + 1° + 21'
..................= 82° + 21'

Jadi,24° 46' + 57° 35' = 82° 21'