16.hasil dari 1/2(13°14')= 17.hasil dari 3×(12°25')= 18.hasil dari 1/3×17°= 20.hasil dari 2×6°35'-3×4°21'

Kelas 7 Matematika
Bab Derajat

1° = 60'

16] 1/2 . (13° 14')
= 1/2 . (13 . 60' + 14')
= 1/2 . (780' + 14')
= 1/2 . 794
= 397'
= 6° 37'

17] 3 . (12° 25')
= 3 . (12 . 60' + 25')
= 3 . (720' + 25')
= 3 . 745'
= 2.235'
= 37° 15'

18] 1/3 . 17°
= 1/3 . (17 . 60')
= 1/3 . 1.020'
= 340'
= 5° 40'

20] 2 . 6° 35' - 3 . 4° 21'
= 2 . (6 . 60' + 35') - 3 . (4 . 60' + 21')
= 2 . (360' + 35') - 3 . (240' + 21')
= 2 . 395' - 3 . 261'
= 790' - 783'
= 7'

Jawabannya terlampir ya