This discussion is about units of time. Here students will be introduced to the different units of the time chart.

In this learning concept, the students will also learn to

- Convert seconds to minutes and convert minutes to seconds.
- Convert hours to minutes and minutes to hour conversion.
- Convert hours to days and convert days to hours.

Each concept is explained to class 5 maths students using illustrations, examples, and mind maps. Students can assess their learning by solving the two printable worksheets given at the page’s end.

Download the units of time worksheet for class 5 and check the solutions to the units of time question for class 5 provided in PDF format.

**The simplest units of time are:**

- Hour
- Minutes
- Seconds

**The relation between the units of time:**

- 1 hour = 60 minutes
- 1 minute = 60 seconds

- To convert one unit of time to another we either multiply or divide it by the converting factor.
- The converting factor is the value by which we multiply or divide.
- The converting factor depends upon the relation between the units.
- For example, the relation between hours and minutes is “1 hour = 60 minutes”.
- Therefore, the converting factor for converting the hours to minutes or minutes to an hour is 60.
- To convert a bigger unit to a smaller unit we multiply.
- To convert a smaller unit to a bigger unit we divide.

**Convert Hours to Minutes:**

To convert hour to minutes we multiply it by 60.

**Example:**

Convert 5 hours to minutes.

**Solution:**

Multiply 5 by 60 to convert 5 hours to corresponding minutes.

(5 × 60) = 300 minutes

Therefore, 5 hours = 300 minutes.

To convert minutes to hours we divide it by 60.

**Example:**

Convert 180 minutes to hours.

**Solution:**

Divide 180 by 60 to convert 180 minutes into an hour.

(180 `÷`

60) = 3 hours

Therefore, 180 minutes = 3 hours.

To convert minutes to seconds we multiply it by 60.

**Example:**

Convert 8 minutes to seconds.

**Solution:**

Multiply 8 by 60 to convert 8 minutes to seconds.

(8 × 60) = 480 seconds

Therefore, 8 minutes = 480 seconds.

To convert seconds to minutes we divide it by 60.

**Example:**

Convert 120 seconds to minutes.

**Solution:**

Divide 120 by 60 to convert 120 seconds to minutes.

(120 `÷`

60) = 2 minutes

Therefore, 120 seconds = 2 minutes.

**The simplest unit of time are:**

- Day
- Week
- Months
- Year

- 1 day = 24 hours
- 1 week = 7 days
- 1 month = 30 days
- 12 months = 1 years
- 1 year = 365 days

To convert days to hours we multiply it by 24.

**Example:**

How many hours are there in 8 days?

**Solution:**

We know 1 day has 24 hours.

Multiply 8 by 24 to get the equivalent hours in 8 days.

(8 × 24) = 192 hours

Therefore, 8 days = 192 hours.

To convert hours to days we divide it by 24.

**Example:**

How many days will 72 hours make?

**Solution:**

We know 1 day has 24 hours.

Divide 72 by 24 to get the equivalent days.

(72 `÷`

24) = 3 days

Therefore, 72 hours will make 3 days.

- In a similar way, one unit of time can be converted to another unit.

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