Step-by-step Maths Level 5 · Perimeter of rectilinear shapes, time and money problems · Summary
Step-by-step Maths Level 5 Perimeter of rectilinear shapes, time and money problems: summary and key words
Part of the Step-by-step Maths Level 5 perimeter of rectilinear shapes, time and money problems chapter. Chapter overview · whole chapter on one page
Chapter summary
| Skill | Method |
|---|---|
| Perimeter | Add all the sides; find missing sides by subtraction first |
| Hours and minutes | 1 h = 60 min; hours × 60; minutes ÷ 60, remainder is minutes |
| Durations | Count to the next hour, then whole hours, then minutes; across midnight, count to 24:00 |
| Money | Line up the points; total the costs first; keep two places for pence |
| Change and operations | Change = paid − total; choose the operation from the key words and explain |
Can you…?
- I can find the perimeter of a rectilinear shape, including missing sides
- I can convert between hours, minutes and seconds
- I can find a time or a duration across an hour or midnight
- I can solve two-step money problems in pounds and pence
- I can give change from a total, and choose and explain the operation
Key terms
- rectilinear
- a shape made only of straight sides with right angles
- perimeter
- the distance all the way round a shape
- duration
- how long something lasts
- change
- the money given back when you pay more than the cost