1. 8 1/4 menit = ......detik 2. 50 detik = .......menit 3. 310 detik = ........menit 4. 15 menit = ........ jam 5. 420 menit = ....... jam TOLONG DENGAN CARANYA

1. 8 1/4 menit = 33/4 menit = 33/4 • 60 = 495 detik
2. 50 detik = 50/60 menit = 5/6 menit = 0,83 menit
3. 310 detik = 310/60 menit = 31/6 menit = 5,167 menit
4. 15 menit = 15/60 jam = 1/4 jam = 0,25 jam
5. 420 menit = 420/60 jam = 7 jam

1. 8 1/4 = 8 1/4 × 60 = 8,15 × 60 = 489 { 15 detik = 1/4 detik }
2. 50 detik = 50/60 = 5/6 menit { 60 detik dari 1 menit }
3. 310 detik = 310/60 = 5 10/60 = 5 1/6
4. 15 menit = 15/60 = 1/4 jam { 60 menit dari 1 jam }
5. 420 menit = 420/60 = 7 jam