Mathematics notes, unit 5
Time
Textbook Mathematics Year 1 (DLP), Textbook Part 1 and Part 2, pages Part 2, 31-44
What this chapter covers
- {'You can name the parts of the day': 'morning, afternoon, evening and night (5.1.1)'}
- You can name the hour hand (short) and the minute hand (long) on a clock (5.2.1)
- You know half of an hour, a quarter of an hour and three quarters of an hour (5.2.2)
- You can say and write the time in o'clock, half past and quarter past (5.2.3)
- You can say the 7 days of the week and the 12 months of the year in order (5.1.3, 5.1.4)
- You can use today, tomorrow, yesterday, before and after to solve simple time problems (5.3.1)
5.1Time of the day
One day has different parts. Each part has its own name.
| Part of the day | What we do |
|---|---|
| Morning | wake up, brush teeth, eat breakfast |
| Afternoon | eat lunch, come home from school |
| Evening | play outside, take a bath |
| Night | eat dinner, sleep |
The sun is up in the day. The moon and stars come out at night.
When do you eat breakfast? When do you go to sleep?
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Breakfast is in the morning. We sleep at night.
5.2The clock
A clock face has the numbers 1 to 12. It has two hands.
hour hand = short hand. minute hand = long hand.
Which hand is long?
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The minute hand.
5.3Half, quarter and three quarters of an hour
The minute hand starts at 12. When it moves round the clock face, the part it covers is part of an hour.
quarter of an hour
half of an hour
three quarters of an hour
Figures drawn for this site; idea from Mathematics Year 1, Part 2, pp. 33-34.
Think of fractions: 1 over 4 is a quarter, 2 over 4 is a half, 3 over 4 is three quarters.
The minute hand moves from 12 to 6. How much of an hour is that?
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Half of an hour.
5.4Say and write the time
Look at the hour hand first. Then look at the minute hand.
Three o'clock (3:00)
Half past six (6:30)
Quarter past nine (9:15)
- Minute hand on 12: o'clock.
- Minute hand on 6: half past. The hour hand is between two numbers.
- Minute hand on 3: quarter past.
Careful! At half past six the hour hand is between 6 and 7. It has not reached 7 yet.
The minute hand is on 12 and the hour hand is on 8. What is the time?
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Eight o'clock (8:00).
5.5Days of the week
There are 7 days in one week.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|
| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
Example
Today is Friday.Yesterday was Thursday. Tomorrow is Saturday. The day after tomorrow is Sunday.
Tuesday is between Monday and Wednesday.
Today is Monday. What day was yesterday?
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Sunday. It comes before Monday.
5.6Months of the year
There are 12 months in one year.
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|
| January | February | March | April | May | June |
| 7 | 8 | 9 | 10 | 11 | 12 |
| July | August | September | October | November | December |
- The first month is January. The last month is December.
- Before May is April. After September is October.
Which month comes after June?
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July.
5.7Solve problems about time
Example
Today is Tuesday. Nizam has PE again the day after tomorrow.Tuesday, Wednesday (tomorrow), Thursday (the day after tomorrow). He has PE on Thursday.
Example
Ajay has a test after September.After September is October. The test is in October.
Say the days or months in order, one by one. Use your fingers to count.
Today is Friday. Jeni visits her grandmother tomorrow. Which day is that?
Show answerHide answer
After Friday comes Saturday.
Summary
- Parts of the day: morning, afternoon, evening, night.
- Hour hand is short. Minute hand is long.
- Quarter, half and three quarters of an hour: minute hand on 3, 6 and 9.
- Say the hour hand first. Minute hand on 12 is o'clock, on 6 is half past, on 3 is quarter past.
- 7 days in a week. 12 months in a year.