We will learn how to calculate the time duration in minutes and in hours.

Ron and Clara play badminton every evening. Yesterday, their game started at 5 : 15 p.m. and finished at 5 : 50 p.m. How long did their game last?

50 minutes — 15 minutes---- 35 minutes.

Rita left for Naira’s house at 7 : 30 p.m. She reached Naira’s house at 8:10 p.m. How long did it take her on the way?

7 : 30 p.m. → 8 : 00 p.m. → 8 : 10 p.m.

It took Rita 40 minutes to reach Naira’s house.

**Time Duration (in hours and minutes)**

Uma's
flight took off from New Delhi at 11 : 15 in the morning (11 : 15
a.m.). When it arrived in Mumbai, her watch read 1 : 32 in the afternoon
(1 : 32 p.m.). How long was the flight?

Look at the clocks.

Count the number of hours from 11 : 15 to 1 : 15. It is 2 hours.

Count by 5s and 1s to count the minutes from 1 : 15 to 1 : 32.

It is 17 minutes.

The flight was 2 hours and 17 minutes long.

Andy left his home for school at 6 : 30 a.m. He reached school after 40 minutes. At what time did he reach school?

30 minutes + 10 minutes

Andy reached school at 7 : 10 a.m.

**Related Concepts **

**● ****To
Measure the Length of a Line-segment**** **

**● ****Examples
on Unit of Mass or Weight**

**● ****Units
for The Measurement of Capacity**

**● ****Examples
on Measurement of Capacity**

**● ****Antemeridian
(a.m.) or Postmeridian (p.m.)**

**● ****Calendar**

**● ****Reading
and Interpreting a Calendar**

**4th Grade Math Activities****From Time Duration to HOME PAGE**

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