Elapsed Time — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
In Grade 3, from 6:47 to 7:03 are 16 minute.
Corrected: In Grade 3, from 6:47 to 7:03 is 16 minutes.
6:47 to 7:00 is 13 min, plus 3 min, equals 16 minutes elapsed.
2. Fix the sentence:
Grade 3 learner compute 2:38 to 3:11 is 32 minute.
Corrected: Grade 3 learners compute 2:38 to 3:11 is 33 minutes.
2:38 to 3:00 is 22 min, 3:00 to 3:11 is 11 min, total 33 minutes.
3. Fix the sentence:
In Grade 3, 9:14 to 9:29 take 15 minute.
Corrected: In Grade 3, 9:14 to 9:29 takes 15 minutes.
Both are in the 9 o'clock hour: 29 - 14 = 15 minutes exactly.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. In Grade 3, from 4:26 to 4:49 is 23 minutes.
Same hour, so 49 - 26 = 23 minutes of elapsed time.
2. In Grade 3, from 7:52 to 8:14 is 22 minutes.
7:52 to 8:00 is 8 min, then 14 more, so 22 minutes total.
3. In Grade 3, from 10:03 to 10:38 equals 35 minutes.
Same hour difference: 38 - 3 = 35 minutes elapsed.
4. In Grade 3, from 1:58 to 2:07 is 9 minutes.
1:58 to 2:00 is 2 min, plus 7 min more, equals 9 minutes.
Part C: True or False?
Read each statement. Circle True or False.
1. In Grade 3, from 5:29 to 5:58 is 29 minutes of elapsed time.
True False
Both in the 5 o'clock hour: 58 - 29 = 29 minutes.
2. In Grade 3, from 11:44 to 12:02 is 22 minutes.
True False
11:44 to 12:00 is 16 min, plus 2 min, equals 18 minutes.
3. In Grade 3, a digital clock shows 1-minute precision for elapsed time.
True False
Digital clocks update each minute so students can read exact durations.