8 minutes + 6 minutes - 2 minutes = ______ seconds
270 seconds
800 seconds
740 seconds
720 seconds
8 + 6 - 2 = 14 - 2 = 12 minutes
1 minute = 60 seconds
∴ 12 minutes = 12 × 60 = 720 seconds
Answer = 720 seconds
3 hours 10 minutes - 2 hours 55 minutes = ______ seconds