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11
Time
LEARNING ObjEctIvEs
After studying this chapter, students will be able to...
y read and write time in hours, minutes and seconds
y convert 12-hour format to 24-hour format and vice versa
y find the time duration between two events
y calculate the number of days between two events
y convert units of time—days, hours, and minutes to each other
y add and subtract measures of time
21 st
Century #Subject Enrichment
Skills
Warm Up
Railway Timetable
A railway timetable tells us about the arrival and departure times of a train. You
must have seen it at a railway station. The timetable helps people who have to
travel by train.
Kanika, a student of Class 4, is making
a timetable of some trains for a station.
Look at the timetable given on the next
page. Some entries in the timetable
are missing. Can you find the missing
information? Each train departs an
hour after its time of arrival.
180 Mathematics 4
