Class 4 (SSC) • Mathematics (गणित)Chapter 7: Time - Duration and Calculation⭐ Topic 1
Time - Duration and Calculation
We learn to calculate time duration between two events and solve problems involving adding or subtracting time, useful for daily planning.
1
Know it
Step 1 of 3
2
See the pattern
Step 2 of 3
3
Try it out
Step 3 of 3
Fun picture
Try it now
Learn the idea step by step
1
Know it
Time duration is the difference between a start time and an end time, like calculating how long a movie or school period lasts.
2
See the pattern
To calculate duration, we find the difference in hours and minutes between the start and end times, converting when needed.
Quick revision
Remember these!
- Duration = end time - start time.
- We find the difference in hours, minutes.
- Convert when needed (60 min = 1 hour).
- Adding time combines hours and minutes.
- Convert excess minutes into hours.
- This helps calculate accurate duration.
- It aids daily planning.
- It helps manage schedules and estimate time.
Words to know
time - duration and calculationssc class 4