Elapsed Time (Intro) — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. From 1:00 to 1:15 is 15 minutes.
A quarter-hour is 15 minutes, so 1:00 to 1:15 is a single 15-minute jump.
2. From 2:15 to 2:45 is 30 minutes.
2:15 to 2:30 is 15 min, and 2:30 to 2:45 is 15 more min, so total is 30 minutes.
3. From 3:00 to 3:45 is 45 minutes.
Three 15-minute jumps from 3:00 land on 3:45, so elapsed time is 45 minutes.
4. From 4:15 to 5:00 is 45 minutes.
4:15 to 4:30, 4:30 to 4:45, 4:45 to 5:00 is 3 quarter-hours, or 45 minutes.
5. From 6:00 to 7:00 is 60 minutes.
A whole hour has 60 minutes, so 6:00 to 7:00 is 60 minutes or 1 hour.
6. From 9:45 to 10:15 is 30 minutes.
9:45 to 10:00 is 15 min, then 10:00 to 10:15 is 15 more min, for 30 minutes total.
7. From 11:00 to 11:30 is 2 quarter-hours.
A half-hour is made of two quarter-hours, so 11:00 to 11:30 is 2 quarter-hours.
8. From 8:15 to 8:30 is 15 minutes.
8:15 to 8:30 is a single quarter-hour hop, which is 15 minutes.
9. From 12:00 to 12:45 is 45 minutes.
12:00 to 12:15 to 12:30 to 12:45 is 3 jumps of 15 minutes, or 45 minutes.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
From 2:00 to 2:15
→ 15 min
15 min
From 4:15 to 4:45
→ 30 min
30 min
From 3:00 to 3:45
→ 45 min
45 min
From 5:15 to 6:15
→ 1 hour
1 hour
2:00 to 2:15 is 15 min. 4:15 to 4:45 is 30 min. 3:00 to 3:45 is 45 min. 5:15 to 6:15 is 1 hour.