Capacity – Litres and Millilitres (Primary 6)

MATHEMATICS

SECOND TERM  

WEEK 7

PRIMARY 6

THEME – MEASUREMENTS 

PREVIOUS LESSON – Second Term Scheme of Work and Plan Lesson Notes for MATHEMATICS Week 1 to Week 12 Primary Schools

TOPIC – CAPACITY 

LEARNING AREA 

1. Relationships between Litres and Millilitres

2. Addition and Subtraction of Capacity

3. Multiplication and Division of Capacity

4. Word Problems Involving Capacity

 

PERFORMANCE OBJECTIVES 

By the end of the lesson, the pupils8 should have attained the following objectives (cognitive, affective and psychomotor) and should be able to –

1. To use standard units.

2. solve word problems involving litres.

ENTRY BEHAVIOUR

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of Standard bottles or containers of Ragolis or Swan water, buckets of different sizes.

METHOD OF TEACHING – Choose a suitable and appropriate methods for the lessons.

Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons. 

REFERENCE MATERIALS

1. Scheme of Work

2. 9 – Years Basic Education Curriculum

3. Course Book

4. All Relevant Material

5. Online Information

CONTENT OF THE LESSON  

LESSON ONE – INTRODUCTION TO CAPACITY 

Pupil’s Activities 1 – Capacities of Different Containers 

Identify the capacity of the following containers.

Teacher’s remark – The capacity of an object is the amount of substance (either liquid or solid) it can hold or contain. The above containers hold different amounts liquid. 

Pupil’s Activities 2 – Unit of Capacity (Litre and Millilitres) 

Study the Chart below:

1 litre (l) = 1 000 millilitres (ml)

1.5 l = 1 500 ml

2 l = 2 000 ml

3 l = 3 000 ml

0.1 l = 100 ml

0.2 l = 200 ml

0.5 m = 500 ml

Discuss the relationship between litre and millilitre.

Expected response – for every 1 litre, we have 1000 millilitres.

Teacher’s comments – Capacity is measured in the SI base unit called litres (L). The most common units for capacity are litre (L) and millilitre (mL).

Teacher’s/Pupil’s Activities 2 – Working Examples 

Change each of the following to millilitres.

1. 7 l

2. 1.8 l

Change each of the following to litres.

3. 6 000 ml

4. 1 500 ml

 

Solutions

1. 7 l

1 l = 1 000 ml

2 l = 2000 ml, 2 x 1 000 l = 2 000 ml

7 x 1 000 ml = 7 000 ml.

2. 1.8 l = 1 l + 0.8 l

= 1 000 ml + 800 ml

= 1 800 ml.

3. 6 000 ml = 6 x 1000 ml

= 6 x 1000 ml/1000

= 6 l.

4. 1 500 ml = 1 000 ml + 500 ml

= 1 000 ml/1000 + 500 ml/1 000

= 1 l + 0.5 l

= 1.5 l.

Pupil’s Activities – Class Exercise/Take Home 

Change each of the following to millilitres.

1. 5.5 l

2. 3.8 l

Change each of the following to litres.

3. 5 600 ml

4. 2 300 ml

LESSON TWO – ADDITION AND SUBTRACTION OF CAPACITY (LITRES AND MILLILITRES) 

Pupil’s Activities 1 – Addition and Subtraction of Numbers 

1. Add 23.52 + 15.11

2. Subtract 15.11 from 20.10

Solutions

23.52

15.11 (+)

_______

38.63

20.10

15.11 (—)

_______

05.99

Teacher’s/Pupil’s Activities 2 – Addition and Subtraction of Capacity 

1. Add 23 l 526 ml + 15 l 101 ml

2. Subtract 15 l 110 ml from 20 l 105 ml

Solutions

23 l 526 ml

15 l 101 ml (+)

________

38 l 627 ml

20 l 105 ml

15 l 110 ml (—)

________

04 l 995 ml

Pupil’s Activities 3 – Class Exercise/Take Home 

Simplify the following.

1. 34 l  534 ml + 121 123 ml

2. 453 l  111 ml + 111 l  231 ml

3. 435 l   110 ml — 321 l  231 l

4. 5.5 l – 3.8 l

LESSON THREE – MULTIPLICATION OF CAPACITY 

Pupil’s Activities – Quick Exercise (Oral)

1. 6 x 6 =

2. 12/3 =

3. 7 l x 3 =

4. ½ x 1 000 ml =

Teacher’s/Pupil’s Activities – Multiplication of Capacity 

Work Examples

1. 2 l 2501 ml × 3

2 l  251 ml

×         3

_________

6 l  753 ml

 

2. 15 l  410 ml × 5

15 l 410 ml

×         5

_________

77 l  050 ml

Pupil’s Activities 2 – Class Exercise/Take Home 

1. 34 l  500 ml × 2

2. 2 l  492 ml × 4

3. 21l  435 ml × 5

4. 20 l  640 ml × 3

LESSON FOUR – DIVISION OF CAPACITY 

Pupil’s Activities 1 – Quick Exercise (Oral)

1. 10 ÷ 2 =

2. 8 ÷ 4 =

3. 20 ÷ 4 =

4. 36 ÷ 3 =

Teacher’s/Pupil’s Activities 2 – Division of Capacity 

Working Examples

1. 75 l 250 ml ÷ 5

2. 24 l 800 ml ÷ 4

Solutions

1. 75 l 250 ml ÷ 5

      13 l 50 ml

___________

5√(75 l 250 ml)

(—) 75 l 250 ml

___________

00  000

Therefore,

75 l 250 ml ÷ 5 = 13 l 50 ml

 

2. 24 l 800 ml ÷ 4

6 ml 200 ml

___________

4√(24 l 800 ml)

(—) 24 l 800 ml

___________

00  000

Therefore,

24 l 800 ml ÷ 4 = 6 ml 200 ml

Pupil’s Activities 3 – Class Exercise/Take Home 

1. 16 l 160 ml ÷ 4 =

2. 81 l 900 ml ÷ 9 =

3. 27 l 330 ml ÷ 3 =

LESSON FIVE – WORD PROBLEMS ON CAPACITY

Teacher’s/Pupil’s Activities – Working Examples and Class Exercise/Take Home 

1. There is 457 liters and 460 milliliters of water in the tank. If 139 liters and 125 milliliters of water is used, how much water is left in the tank?

2. An oil can holds 8 l of oil. How much oil is left in the container if 4 l 750 ml of oil is used?

3. A petrol attendant sold 35 l 250 ml of petrol on 2 days of a week and 43 l 455 ml of petrol in next 3 days. What quantity of petrol did he sell in 5 days?

4. A drum contains 1500 litres of petrol. How long will it last if a driver take 50 litres a day?

For more word problems on capacity, visit – maths on msths dot com

PRESENTATION

To deliver the lesson, the teacher adopts the following steps:

1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;

2. Guides pupils to work in groups to compare the capacities of the containers given to them e.g. different sizes of graduated containers.

Pupil’s Activities – Calculate capacities of given containers.

3. Guides pupils to solve word problems on capacity.

4. Pupil’s Activities – Solve word problems on capacity.

CONCLUSION

To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.

LESSON EVALUATION 

Pupils to:

1. find the capacities of common containers in their respective homes. Record the results and bring them to class for discussion.

2. solve word problems on capacities.