DAV Board Class 3 Mathematics (Primary Mathematics) | 100% Authentic Textbook Solutions
DAV Class 3 Maths Unit 6 Solutions Day, Date and Time
Get complete, step-by-step textbook solutions for DAV Class 3 Primary Mathematics Unit 6: Day, Date and Time. This comprehensive guide covers all unit worksheets: reading clock faces to the exact minute, quarter past, half past, quarter to, a.m. and p.m. time notation, days of the week, months of the year, leap year calculations, and calendar interpretation strictly following the DAV CMC curriculum.
| Class | Subject | Textbook | Unit Number & Title | Key Mathematical Concepts |
|---|---|---|---|---|
| Class 3 | Mathematics | Primary Mathematics | Unit 6: Day, Date and Time | Reading clock, quarter past/to, half past, a.m. & p.m., calendar & leap year |
Worksheet 1: Reading Time on a Clock Face
Basic Clock Facts:
• A clock face is divided into 12 big divisions (1 to 12) and 60 small divisions (minutes).
• The short hand is the Hour Hand. It takes 12 hours to complete one round.
• The long hand is the Minute Hand. It moves from one number to the next in 5 minutes and takes 60 minutes (1 hour) to complete one full round.
• $mathbf{1 text{ hour} = 60 text{ minutes}}$ | $mathbf{1 text{ minute} = 60 text{ seconds}}$ | $mathbf{1 text{ day} = 24 text{ hours}}$
| Position of Hands | Digital Time Notation | Time in Words |
|---|---|---|
| Hour hand at 4, Minute hand at 12 | 4:00 | 4 o’clock |
| Hour hand past 7, Minute hand at 3 ($3 times 5 = 15$ min) | 7:15 | Quarter past 7 (15 minutes past 7) |
| Hour hand between 9 & 10, Minute hand at 6 ($6 times 5 = 30$ min) | 9:30 | Half past 9 (30 minutes past 9) |
| Hour hand near 2, Minute hand at 9 ($9 times 5 = 45$ min) | 1:45 | Quarter to 2 (15 minutes to 2) |
| Hour hand past 5, Minute hand at 8 ($8 times 5 = 40$ min) | 5:40 | 40 minutes past 5 (or 20 minutes to 6) |
Worksheet 2: Understanding a.m. and p.m.
Rules:
• a.m. (ante meridiem): The period from 12 midnight to 12 noon.
• p.m. (post meridiem): The period from 12 noon to 12 midnight.
• 12:00 in the middle of the day is called 12 Noon (neither a.m. nor p.m.).
• 12:00 in the middle of the night is called 12 Midnight.
| Daily Activity | Given Time | Correct Notation (a.m. / p.m.) |
|---|---|---|
| Waking up in the morning | 6:30 | 6:30 a.m. |
| Having lunch at school | 1:15 | 1:15 p.m. |
| Playing in the park in the evening | 5:00 | 5:00 p.m. |
| Eating dinner with family | 8:45 | 8:45 p.m. |
| Sleeping at night | 10:00 | 10:00 p.m. |
Worksheet 3: Days, Months and Calendar Reading
Days of the Week (7 Days): Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
• Months with 31 days (7 months): January, March, May, July, August, October, December.
• Months with 30 days (4 months): April, June, September, November.
• February: Has 28 days in an ordinary year ($365 text{ days}$) and 29 days in a leap year ($366 text{ days}$).
• Leap Year Rule: A year divisible by 4 is a leap year (e.g., 2024, 2028, 2032).
Calendar Questions:
- Q1. How many weeks are there in an ordinary year?
There are 52 weeks and 1 day in an ordinary year ($365 div 7 = 52$ weeks, remainder 1). - Q2. Which month comes immediately after July?
August (both July and August have 31 days). - Q3. If 5th September is a Monday, what day will 12th September be?
Since $5 + 7 = 12$, 12th September will also be a Monday.
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