Grade 4 math · P.1 · The 24-Hour Clock
Elapsed time: train and bus times (24-hour clock)
This is the 24-hour clock, often called military time. 13:00 is 1:00 p.m. Add 12 to afternoon hours.
See worked examples
A canoe trip starts at 16:30 and lasts 1 hour 5 minutes. What time does it end?
Answer: 17:35
Fatima started a bake sale at 16:10 and finished at 19:05. How long did it take?
Answer: 2 hours 55 minutes
A bake sale starts at 10:40 and lasts 1 hour 50 minutes. What time does it end?
Answer: 12:30
Tip: This is the 24-hour clock, often called military time. 13:00 is 1:00 p.m. Add 12 to afternoon hours.
Curriculum
Common Core: 3.MD.A.1, 4.MD.A.2
On paper: this skill is in the printable pack Grade 4 Time and Measurement Word Problems (Common Core), with an answer key.
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