Topics
9. Time
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Stage 2

9.05 Passing time

Lesson
Practice
Lesson

Are you ready?

Can you read the time on a clock? If you want to practice this more try these  here  .

Examples

Example 1

What time is shown on the clock?

A clock where the hour hand is passed 9 and the minute hand is pointing at 7.
Worked Solution
Create a strategy

For the hours, enter the number that the hour hand has just passed. For the minutes, multiply what the minute hand is pointing at by 5.

Apply the idea

The hour hand has just passed 9.

The minute hand is pointing at 7, so, 7\times5=35.

The time shown is 9\text{:}35.

Idea summary

The small hand on the clock points to the hour of the day and the long hand points to the minutes within that hour.

Passing time

Here we are going to look at adding and subtracting time in minutes.

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Examples

Example 2

Taylan's guitar lesson went from 11\text{:}15 until midday.

A clock where the hour hand is passed 11 and the minute hand is pointing at 3.

How many minutes was Taylan's lesson?

Worked Solution
Create a strategy

Use the clock to see how much the minute hand needs to move.

Apply the idea

To get to midday or 12 noon, the minute hand needs to move from 3 to 12 on the clock. So it needs to move 9 numbers. If we multiply this by 5 we can find the number of minutes that has passed.

\displaystyle 9\times 5\displaystyle =\displaystyle 45Multiply 9 by 5

Taylan's lesson is 45 minutes.

Idea summary

You can use a picture of a clock to help you visualise the adding or subtracting of minutes.

Outcomes

MA2-13MG

reads and records time in one-minute intervals and converts between hours, minutes and seconds

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