시간 단원 종합

P.1Fill in each box. 1 minute = 60 seconds · 1 hour = 60 minutes · 1 day = 24 hours · 1 week = 7 days · 1 year = 12 months

1. 1
   $7\text{ minutes}36\text{ seconds}=$ $\boxed{}\text{ seconds}$
2. 2
   $7\text{ weeks}5\text{ days}=$ $\boxed{}\text{ days}$
3. 3
   $420\text{ minutes}=$ $\boxed{}\text{ hours}$
4. 4
   $2\text{ hours}29\text{ minutes}=$ $\boxed{}\text{ minutes}$

P.2Add or subtract. Regroup when you need to. 1 hr = 60 min · 1 min = 60 sec · 1 day = 24 hr · 1 wk = 7 days

1. 5
   $1\text{ hr}44\text{ min}+3\text{ hr}37\text{ min}=$ $\boxed{}\text{ hr}\boxed{}\text{ min}$
2. 6
   $3\text{ min}6\text{ sec}+5\text{ min}52\text{ sec}=$ $\boxed{}\text{ min}\boxed{}\text{ sec}$
3. 7
   $9\text{ hr}32\text{ min}-4\text{ hr}11\text{ min}=$ $\boxed{}\text{ hr}\boxed{}\text{ min}$
4. 8
   $6\text{ hr}22\text{ min}-2\text{ hr}38\text{ min}=$ $\boxed{}\text{ hr}\boxed{}\text{ min}$

P.3Find the elapsed time, or the missing start or end time.

1. 9
   Start6:05 a.m.

   ?

   End8:15 a.m.

   Elapsed time: 
2. 10
   Start?

   2 hours 20 minutes

   End9:45 a.m.

   Start time: 
3. 11
   Start8:50 a.m.

   40 minutes

   End?

   End time: 
4. 12
   Start6:55 p.m.

   ?

   End10:45 p.m.

   Elapsed time: 

P.1Convert Units of Time

1. 1456 seconds
2. 254 days
3. 37 hours
4. 4149 minutes

P.2Add & Subtract Time

1. 55 hr 21 min
2. 68 min 58 sec
3. 75 hr 21 min
4. 83 hr 44 min

P.3Elapsed Time

1. 92 hours 10 minutes
2. 107:25 a.m.
3. 119:30 a.m.
4. 123 hours 50 minutes