**Solve problems involving duration, including using 12- and 24-hour time within a single time zone (ACMMG199)**

**LO:To solve problems involving duration
**

**Know:**

- what are the units of time
- what the sequential order of time
- how to calculate elapsed time
- 12-hour and 24-hour time
- how to read the time in an analog clock

**Understand:**

- that time progresses in a logical fashion.

**Do:**

- I can solve problems involving duration and elapsed time..

**Calculating Elapsed time**

The easiest way to calculate elapsed time is to look at 2 time periods.

- starting time
- finishing time

**An easy way to calculate elapsed time is to use a timeline.
**

**If you use the hopping method it should help you calculate the duration of tasks.**

- hop the hours first
- then hop the minutes