⏰ Time
Class 4 Maths · Unit 10 of 12 · about 240 minutes
This unit builds on the Grade 3 clock skills of reading time to the half hour and quarter hour. Children will read time to the minute on analog and digital clocks, use a.m. and p.m. correctly, know the number of minutes in an hour and hours in a day, find elapsed time, and solve calendar problems. These skills are essential for everyday life and for later work on time, speed and data.
What your child will learn
- Students will be able to read and write time to the minute on an analog clock and a digital clock.
- Students will be able to use a.m. and p.m. to describe the time of day in real-life situations.
- Students will be able to convert between hours and minutes, and between days and hours.
- Students will be able to calculate elapsed time in hours and minutes, including crossing the hour or the half-hour.
- Students will be able to solve problems involving calendars, including days in a month, weeks in a month, and dates.
Lessons in this unit
- Reading time to the minute: Read the time to the minute on an analog clock by counting the minute marks around the clock face, and write it in digital form. and elapsed time.
- a.m. and p.m.: Understand the 24-hour day divided into a.m. (midnight to noon) and p.m. (noon to midnight). Use a.m. and p.m. in real-life contexts.
- Minutes in an hour, hours in a day: Know and use the facts: 1 hour = 60 minutes, 1 day = 24 hours. Convert between hours and minutes, and days and hours.
- Elapsed time: Find the amount of time between a start and an end time, in hours and minutes. Use a number line or clock to count forward.
- Calendar problems: Use a calendar to find the day of a date, the number of days in a month, and dates that are a certain number of days or weeks later.
Key words
- minute hand
- The long hand on a clock that shows minutes. It goes around the clock once in one hour.
- hour hand
- The short hand on a clock that shows hours. It goes around the clock once in 12 hours.
- a.m.
- The time from 12:00 at night to 12:00 noon. It is morning time.
- p.m.
- The time from 12:00 noon to 12:00 at night. It is afternoon and evening time.
- elapsed time
- The amount of time that passes from a start time to an end time.
- calendar
- A chart that shows the days, weeks, and months of a year.
- leap year
- A year with 366 days. It comes every 4 years. February has 29 days in a leap year.
Help your child at home
What to watch for
- Reading the minute hand as the hour number (e.g., pointing at 9 means 9 minutes).
- Help: Count the minute marks from 12. The number 9 is at 45 minutes, not 9 minutes.
- 12:00 noon is 12:00 a.m.
- Help: 12:00 noon is 12:00 p.m. because p.m. starts at noon. 12:00 a.m. is midnight.
- 1 hour = 100 minutes (because of base-10).
- Help: Time uses base-60. There are 60 minutes in 1 hour.
- Subtracting minutes and hours separately without regrouping: 9:40 to 10:15 is 1 hour 75 minutes.
- Help: Count forward: 9:40 to 10:00 is 20 minutes, then 10:00 to 10:15 is 15 minutes. Total 35 minutes.
Try this at home
- Count the minute marks from 12 to the minute hand.
- Label activities with a.m. or p.m.
- How many minutes in 3 hours?
- Find elapsed time from 2:15 p.m. to 3:45 p.m.
Quick questions to ask aloud
- How many minute marks are there around the whole clock face?
Show answer
There are 60 minute marks around the clock, one for each minute in an hour. - Riya goes to school at 8:00 in the morning. How should she write this time? (8:00 a.m. / 8:00 p.m. / 8:00 m. / 8:00)
Show answer
Morning times are a.m. So 8:00 in the morning is 8:00 a.m. - How many minutes are there in 1 hour?
Show answer
There are 60 minutes in 1 hour.
Frequently asked questions
What will my child learn in "Time" (Class 4 Maths)?
Your child will be able to: read and write time to the minute on an analog clock and a digital clock.; use a.m. and p.m. to describe the time of day in real-life situations.; convert between hours and minutes, and between days and hours.; calculate elapsed time in hours and minutes, including crossing the hour or the half-hour.; solve problems involving calendars, including days in a month, weeks in a month, and dates..
How does MangoMindz teach "Time"?
In 5 short parts (Reading time to the minute, a.m. and p.m., Minutes in an hour, hours in a day, Elapsed time, Calendar problems). Each part has a picture-based lesson read aloud by Mango Teacher, a quick check, and a quiz built from common mistakes children make, with Mango, a study buddy, for questions.
How long does "Time" take?
About 240 minutes in total, spread over 5 parts of 15–25 minutes each.
How can I help my child with "Time" at home?
Work through a small example together, such as: Count the minute marks from 12 to the minute hand.; Label activities with a.m. or p.m.. Then ask a quick question aloud: How many minute marks are there around the whole clock face?
What mistakes do children often make in "Time"?
Reading the minute hand as the hour number (e.g., pointing at 9 means 9 minutes). Fix: Count the minute marks from 12. The number 9 is at 45 minutes, not 9 minutes. 12:00 noon is 12:00 a.m. Fix: 12:00 noon is 12:00 p.m. because p.m. starts at noon. 12:00 a.m. is midnight. 1 hour = 100 minutes (because of base-10). Fix: Time uses base-60. There are 60 minutes in 1 hour.
Is "Time" free on MangoMindz?
Yes. Every lesson part and quiz in "Time" is free on MangoMindz, with no ads.