### Time and calender - Worksheets

CBSE Worksheet-01

Class - IV Mathematics – Time and calender

Time Allowed: 30 minutes

- Fill in the blanks with suitable words:
In a leap year, February month has ______ days.

1:15 p.m is_____ hour and _____ minutes ahead of 10:45 a.m.

1000 years = _______ centuries.

9 min =______ seconds.

The hour hand takes _____ hours to move from 5 to 6 on the clock.

- State whether each of the following statement is True or False:
Period of 10 years makes a century.

January month has 30 days.

In 24 hours clock system, 11 noon is denoted as 11:00 hours.

We can write "twenty to 8" for 7:40.

6.45 p.m. in a 24-hour clock system is 18:45 hours.

If Lalit takes 19 hours and 20 minutes and reaches home at 8:30 a.m., then at what time did he start?

It is 8:30 p.m.

It is 1:50 p.m.

It is 1:10 p.m.

It is 7:20 p.m.

A tap was opened into an empty tank at 9:20 a.m. The tank was full at 10:15 a.m. How long did it take to fill the empty tank?

1 hour

50 minutes

45 minutes

55 minutes

20:20 hrs is ________ in the 12 hour clock time.

08:20 pm

10:20 pm

10:20 am

8:20 am

How long will it take the minutes hand to move from:

20 minutes

25 minutes

10 minutes

15 minutes

Reena left her house for school at 9:05 a.m. and reached school at 9:45 a.m. How much time did she take to reach school from her house?

40 minutes

50 minutes

35 minutes

45 minutes

Match the following:

(a) 43200 seconds (I) 30 minutes (b) 60 seconds (ii) 1 hour (c) 3600 seconds (iii) 12 hours (d) 1800 seconds (iv) 1 minute How many days will be there in the year 2020? It that a leap year?

How many days are from

- 3rd May to 1st July
- 5th March to 12th April

How many minutes pass between:

- Half past 8 and quarter past 9
- Half past 4 and quarter to 5

The dance party started at 12:50 and ended at 4:35. How long did the dance party take?

A bus leaves Ahmedabad for Bhavnagar at 6:30 a.m. It takes 5 hours to reach Bhavnagar, at what time it will reach Bhavnagar. After reaching Bhavnagar, it takes another 2:30 hours to reach the exact bus stop along with the traffic. Find the final time at which bus reaches the final bus stop.

Convert the following time into a 12-hour clock system.

- 20:45
- 14:42
- 06:23
- 04:20

Convert the following time into a 24-hour clock system.

- 3:15 a.m.
- 9:35 a.m.
- 2:15 p.m.
- 6:30 p.m.

APRIL 2020

Monday Tuesday Wednesday Thursday Friday Saturday Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Answer the following questions using the above calendar of April 2020.

- which is the first day of the month
- How many times Tuesday come in April 2020?
- which is the last day of the month?
- find the date on the second Sunday?

CBSE Worksheet-01

Class - IV Mathematics – Time and calender

Solution

Fill in the blanks with suitable words:

29. In a leap year, February month has 29 days.

2 hours and 30 minutes.

10:45 a.m to 11:45 a.m = 1 hours.

11:45 a.m to 12:45 p.m = 1 hours.

12:45 p.m to 1:15 p.m = 30 minutes.10

100 years = 1 century.

1000 years = century = 10 centuries540.

As we know, 1 min = 60 seconds

Then, 9 min = 960 = 540 secondsone. The hour hand takes 1 hour to move from 5 to 6 on the clock.

State whether each of the following statement is True or False:

FALSE

Period of 100 years makes a century.False

January month has 31 days.True

In 24 hours clock system, 11 noon is denoted as 11:00 hours.True, We can write "twenty to 8" for 7:40.

True

6.45 p.m. in a 24-hour clock system is 18:45 hours.

6.45 p.m. = 12:00 + 06: 45 = 18:45 hours

- (c) It is 1:10 p.m.

Explanation: Lalit takes 19 hours and 20 minutes and reaches home at 8:30 a.m.

From 12 to 8.30 a.m. 8.30 hours

So 19.20 – 8.30 = 10 hours 50 minutes

10 hours 50 minutes before 12 means 1:10 p.m.

So Lalit started at 1:10 p.m. - (d) 55 minutes

Explanation: A tap was opened into an empty tank at 9:20 a.m.

Tank was full at 10:15 a.m.

Difference = 10: 15 – 9: 20 = 55 minutes

So 55 minutes required to fill the empty tank. - (a) 08:20 pm

Explanation: 20:20 hrs is represent after 12 pm so, it represent as 08:20 in the 12 hour clock time. - (a) 20 minutes

Explanation: First clock show: 3:40 and second clock show: 4:00

So difference = 20 minutes - (a) 40 minutes

Explanation: Reena left her house for school at 9:05 a.m. and reached school at 9:45 a.m.

Time she take to reach school from her house = 9:45 a.m. – 9:05 am = 40 minutes (a) – (iii), (b) – (iv), (c) – (ii), (d) – (i)

- 1 minutes = 60 seconds
- 30 minutes = 30 60 =1800 seconds
- 1 hours = 60 60 = 3600 minutes
- 12 hours = 3600 12 = 43200

There 366 days in year 2020. Yes, it is the leap year 2020.

- 3rd May to 1st July

Days from 3rd May to 31 May = 29 days

Days in June month = 30 days

So, there are 29 + 30 = 59 days - 5th March to 12th April

Days from 5th March to 31st March = 27 days

Day from 1st April to 12th April = 11 days

So, there are 27 + 11 = 38 days

- 3rd May to 1st July
- Half past 8 and quarter past 9

We can write Half past 8 as 8:30 and quarter pass 9 as 9:15

Minute pass between 8:30 to 9:00 = 30 minutes

Minute pass between 9:00 to 9:15 = 15 minutes

So, the minute pass between 8:30 to 9:15 is (30+15) = 45 minutes. - Half past 4 and quarter to 5

We can write Half past 4 as 4:30 and quarter to 5 as 4:45

Minute pass between 4:30 to 4:45 = 15 minutes

So, the minute pass between 4:30 to 4:45 is 15 minutes.

- Half past 8 and quarter past 9
The dance party started at 12:50 and ended at 4:35.

10 minutes + 3 hours + 35 minutes = 3 hours 45 minutesA bus leaves Ahmedabad for Bhavnagar at 6:30 a.m. It takes 5 hours to reach Bhavnagar,

Bus reaches at Bhavnagar at 11:30 a.m. and takes 2:30 hours to reach the stop.

So, 11:30 hours + 2:30 hours is 14:00 hours.

Here, 14:00 hours = 2:00 pm.

So, the bus will reach the bus stop at 2:00 pm.- for A.M. 24 hour clock time and 12 hour clock time both are the same.
- for P.M. to convert 24 hour clock time to 12 hour clock time we have to subtract 12 in 24 hour clock time.

- 20:45

20:45 - 12:00 = 8:45 p.m. - 14:42

14:42 - 12:00 = 2:45 p.m. - 06:23

06:23 a.m. - 04:20

04:20 a.m.

- for A.M. 24 hour clock time and 12 hour clock time both are the same.
- for P.M. to convert 12 hour clock time to 24 hour clock time we have to add 12 in 12hour clock time.

- 3:15 a.m.

3:15 a.m. 03:15 - 9.35 a.m.

9:35 a.m. 09:35 - 2:15 p.m.

2:15 p.m. 12:00 + 2:15 = 14:15 - 6:30 p.m.

6:30 p.m. 12:00 + 6:30 = 18:30

- Wednesday
- 4 times
- Thursday
- 12/04/2020