Capacity – Multiplication and Division in Litres and Millilitres Primary 4 (Basic 4) Term 3 Week 8 Mathematics

MATHEMATICS

THIRD TERM

WEEK 8

PRIMARY 4

THEME – MENSURATION AND GEOMETRY

PREVIOUS LESSON – Capacity and Its Basic Unit of Measurement | Addition and Subtraction in Litres and Millilitres Primary 4 (Basic 4) Term 3 Week 6 Mathematics

TOPIC – CAPACITY

LEARNING AREA

1. Introduction

2. Standard Units of Capacity

3. Addition and Subtraction of Capacity in mℓ and ℓ

4. Word Problems

5. Lesson Evaluation and Weekly Assessment (Test)

LEARNING OBJECTIVES

By the end of the lesson, most pupils should have attained the following objectives –

1. identify the standard unit for capacity measurement.

2. convert millilitres to litres and litres to millilitres.

3. carry out simple multiplication and division involving mℓ and ℓ

4. word problems involving, multiplication and division in mℓ and ℓ

ENTRY BEHAVIOUR

The pupils can identify objects with different capacity.

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of gallons with different capacities.

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 1 – REVISION ON PREVIOUS LESSON

ACTIVITY 1 – CONCEPTS OF CAPACITY

Capacity is the amount of liquid in a container.

It is the measure of the amount or volume of liquid in a container.

The basic units of measurement of capacity are milliliter (mℓ) and liter (ℓ).

The standard unit of measuring capacity is the liter (ℓ).

Small amount of liquid is measured in milliliter (mℓ) while large amount is measured in liter (ℓ).

It is equal to a thousandth of a liter, that’s, 1 ℓ = 1000 mℓ.

The relationship between milliliter (mℓ) and liter (ℓ) is,

`1 000 mℓ = 1 ℓ`

ACTIVITY 2 – CONVERSION OF mℓ TO ℓ

Working Example 1

Convert 5 000 mℓ to litres.

1st, divide the number of millilitres by 1 000,

5 000 ÷ 1 000 = 5

2nd, change the unit to litres,

5 000 mℓ = 5 ℓ

Working Example 2

Convert 3 765 mℓ to litres.

1st, divide the number of millilitres by 1 000,

3 756 ÷ 1 000 = 3.756

2nd, change the unit to liters,

3 756 mℓ = 3.756 ℓ

Or

3 l 756 mℓ

Working Example 3

Convert 167 mℓ to litres.

1st, divide the number of millilitres by 1 000,

167 ÷ 1 000 = 0.167

2nd, change the unit to litres,

167 mℓ = 0.167 ℓ

Working Example 4

Convert 13 g to litres.

1st, divide the number of millilitres by 1 000,

13 ÷ 1 000 = 0.013

2nd, change the unit to litres,

13 mℓ = 0.013 ℓ

Working Example 5

Convert 9 g to litres.

1st, divide the number of millilitres by 1 000,

9 ÷ 1 000 = 0.009

2nd, change the unit to litres,

9 mℓ = 0.009 ℓ

WORKING EXERCISES/ASSIGNMENT

Covert the following to millilitres,

1. 0.9 ℓ

2. 135 ℓ

3. 0.048 ℓ

4. 8 787 ℓ

5. 1.25 ℓ

SOLUTIONS

1. 0.9 mℓ = 0.9 x 1 000 = 0.0009 ℓ

2. 135 mℓ = 135 x 1 000 = 0.135 ℓ

3. 0.048 mℓ = 0.048 x 1 000 = 0.00048 ℓ

4. 8 787 mℓ = 8 787 x 1 000 = 8.787 ℓ

5. 1.25 mℓ = 1.25 x 1 000 = 0.00125 ℓ

ACTIVITY 4 – CONVERSION OF ℓ AND mℓ

Working Example 1

Convert 9 ℓ to millilitres.

1st, multiply the number of ℓ by 1 000,

9 x 1 000 = 9 000

2nd, change the unit of millilitres

9 ℓ = 9 000 mℓ

Working Example 2

Convert 1.5 ℓ to millilitres.

1st, multiply the number of ℓ by 1 000,

1.5 x 1 000 = 1 500

2nd, change the unit of millilitres

1.5 ℓ = 1 500 mℓ

Working Example 3

Convert 0.73 ℓ to millilitres.

1st, multiply the number of ℓ by 1 000,

0.73 x 1 000 = 730

2nd, change the unit of milliliters

0.73 ℓ = 730 mℓ

Working Example 4

Convert 5 ℓ 7 ℓ to millilitres.

1st, multiply the number of ℓ by 1 000,

5 x 1 000 + 7 = 5 007

2nd, change the unit of millilitres

5 ℓ 7 mℓ = 5 007 mℓ

WORKING EXERCISES/ASSIGNMENT

Complete the following:

1. 7 368 g = ________ ℓ

2. 9.515 kg = ________ mℓ

3. 1.2 g = ________ ℓ

4. 1 kg 98 g = ________ ℓ

5. 1 ℓ 98 mℓ = ________ mℓ

LESSON 2 – MULTIPLICATION AND DIVISION INVOLVING WEIGHT

ACTIVITY 1 – MULTIPLICATION OF WEIGHT

WORKING EXAMPLE

1. 30 ℓ x 5

3 0

x 5

_______

1 5 0

Therefore, 30 ℓ x 5 = 150 ℓ

2. 170 mℓ x 9

1 7 0

x 9

_______

1 5 3 0

Therefore, 170 mℓ x 9 = 1 530 mℓ

3. 12.567 ℓ x 4

12.567

x          4

_______

50.268

Therefore, 12.567 ℓ x 4 = 50.268 ℓ.

4. 31 ℓ 855 mℓ x 5

31 ℓ 855 mℓ

x                 5

_____________

159 ℓ 275 mℓ

Therefore, 31 ℓ 855 mℓ x 5 = 159 ℓ 275 mℓ.

ACTIVITY 2 – DIVISION OF WEIGHT

WORKING EXAMPLE

1. 4.8 ℓ ÷ 4

= 4.8/4

= 1.2ℓ

2. 8.4 ÷ 6

= 8.4/6

= 1.4 ℓ

3. 7.2  ÷ 9

= 7.2/9

= 0.8 ℓ

4. 8.0  ÷ 5

= 8.0/5

= 1.5 ℓ

WORKING EXERCISE

1. 91.6 ℓ/2

2. 91.6 ℓ x 2

3. 74.7 ℓ ÷ 3

4. 74.7 ℓ x 3

5. 41.6 ℓ x 8

6. 41.6 ℓ/8

7. 66.6 ℓ ÷ 3

8. 66.6 ℓ x 3

LESSON 3 – WORD PROBLEMS

Word problems are mathematical problems presented a simple language rather than in mathematical notation.

WORKING EXAMPLE

1. Three people bought 5.7 litres of petrol oil and then shared it equally among themselves. How many litres did each of them get?

= 5.7/3

= 1.9ℓ

2. A man bought 43 gallons of kerosene in a day. Each gallon contains 0.6 litres of oil. How many litres did he bought?

= 43 gallons x 0.6ℓ

4 3

x 0.6

______

2 5 8

0 0 0

______

2 5 . 8

The total litres of kerosene is 25.8

WORKING EXERCISE

1. Michael delivers 1ℓ 250 mℓ of milk everyday at Mr. Segun house. What quantity of milk is delivered by the Michael to Mr. Segun house in 6 days?

2. Duduke has 2ℓ of oil. He wants to pour it equally into 250 ml gallons. How many gallons is he able to fill with the oil?

3. Kerosene costs ₦75 per liter. AyanfeOluwa gets his gallon filled with 46 liters of kerosene. How much amount does he pays at the kerosene pump.

4. What is 15 mℓ divided by 3?

5. What is 26 ℓ multiply 25?

LESSON 4 – REVISION OF WEEK 6 AND WEEK 8 LESSONS

LESSON 5 – ASSESSMENT

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. Teacher organizes the pupils in groups or pair depending on the size of the class.

3. Teacher displays chart showing 13 x 5 and 84/4.

4. Teacher asks the groups or pairs to solve the problems on the chart.

Pupil’s Activities – 13 x 5 = 65 and 84/4 = 21

5. Teacher uses the containers and pupil’s responses to introduce the lesson.

Pupil’s Activities – Pay attention to the lesson introduction to understand the concept of the lesson.

6. Teacher guides pupils to multiple and divide in mℓ and ℓ.

Pupil’s Activities – Follow the teacher’s guides to multiple and divide in mℓ and ℓ.

7. Teacher leads pupils to interpret and solve simple word problems on capacity.

Pupil’s Activities – Solve word problem questions.

8. Teacher summarizes each of the lesson on the board with appropriate evaluation.

Pupil’s Activities – Participate actively in the summary of the lesson by responding correctly in the questions and write as instructed.

CONCLUSION

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

NEXT LESSON

Lines of Symmetry on Plane Shapes | Vertical and Horizontal Lines | Cardinal Points | Types of Angles Primary 4 (Basic 4) Term 3 Week 9 Mathematics

LESSON EVALUATION

Teacher asks pupils to,

1. carry out simple multiplication and division involving mℓ and ℓ.

2. word problems involving multiplication and division mℓ and ℓ.