Unit Review: Time

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
   $4\text{ minutes}=$ $\boxed{}\text{ seconds}$
2. 2
   $9\text{ hours}42\text{ minutes}=$ $\boxed{}\text{ minutes}$
3. 3
   $9\text{ days}=$ $\boxed{}\text{ hours}$
4. 4
   $84\text{ months}=$ $\boxed{}\text{ years}$

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
   $7\text{ min}40\text{ sec}-2\text{ min}47\text{ sec}=$ $\boxed{}\text{ min}\boxed{}\text{ sec}$
2. 6
   $9\text{ min}35\text{ sec}-1\text{ min}44\text{ sec}=$ $\boxed{}\text{ min}\boxed{}\text{ sec}$
3. 7
   $1\text{ hr}30\text{ min}+5\text{ hr}33\text{ min}=$ $\boxed{}\text{ hr}\boxed{}\text{ min}$
4. 8
   $4\text{ hr}49\text{ min}+9\text{ hr}48\text{ min}=$ $\boxed{}\text{ hr}\boxed{}\text{ min}$

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

1. 9
   Start2:10 p.m.

   45 minutes

   End?

   End time: 
2. 10
   Start7:10 a.m.

   3 hours 15 minutes

   End?

   End time: 
3. 11
   Start7:00 p.m.

   4 hours 40 minutes

   End?

   End time: 
4. 12
   Start4:10 a.m.

   2 hours 45 minutes

   End?

   End time: 

P.1Convert Units of Time

1. 1240 seconds
2. 2582 minutes
3. 3216 hours
4. 47 years

P.2Add & Subtract Time

1. 54 min 53 sec
2. 67 min 51 sec
3. 77 hr 3 min
4. 814 hr 37 min

P.3Elapsed Time

1. 92:55 p.m.
2. 1010:25 a.m.
3. 1111:40 p.m.
4. 126:55 a.m.