*WEEK 6*

**SUBJECT: MATHEMATICS**

**CLASS: PRIMARY 4**

**TERM: 3RD TERM**

**TOPIC: Capacity**

**SUBTOPIC: Capacity multiplication and division of liters**

**BEHAVIOURAL OBJECTIVES: At the end of the lesson, pupils should be able to:**

**Multiply in liter by whole****Divide in liter by whole****Appreciate liter as the unit of capacity**

**CONTENT**

**Multiplication and division involving litres**

**Multiplication**

Example

Four cars each have 18.5 litres of petrol put in them. How much petrol is this?

18 · 5l

× 4

74 · 0l

**Exercise 1**

Copy and complete the following.

8 · 3l

× 2

2.

7 · 1l

× 8

4 · 7l

× 3

5 · 9l

× 4

3 · 2l

× 9

9 · 4l

× 7

- 5.6 l× 5. 8. 6.2 l× 6 9. 8.0l × 8 10. 1.7l × 9
- 15 · 6l

× 2

- 27 · 9 l

× 8

- 36 · 3 l

× 7

- 47 · 9 l

× 6

- 54 · 8l

× 9

- 68 · 4l

× 3

- 43.6l × 7 18. 52.2l × 9 19. 39.9l × 6 20. 20.7l × 8

**Division**

**Example**

Three customers bought 5.7 litres of palm oil and then

shared it equally among themselves. How many litres did

each customer get?

5.7l ÷ 3 = 1.9l 5.7 /3 = 1.9l

1.9l

3 √5.7

Each customer got 1.9 litres.

**Exercise 2**

Work these out using the method in the example.

- 4.8 l ÷ 4. 2. 8.4 l ÷ 6 3. 7.2l
- 91.6/2l 6. 74.7 /3. 7. 41.6/8l 8. 53.6 /4
- 3√ 17.1l 10. 7 √37.8l 11. 9 √66.6l 12. 5√ 89.5l
- Divide 63.7l

**Examples**

**Word problems on capacity**

- 1. A drum contains 12.58 litres of water, another drum contains 15.71 litres of water.

How much water will the two drums hold?

One drum contains = 12 . 58l

Another drum contains = 15 . 71l

Both drums hold = 28 . 29l

231

- A basin contains 30 litres of water. Bisi used 8.29 litres to wash. How much water is left in

the basin.

A basin contains 30 litres of water = 30 · 00l

+ 8 · 29

21 · 71l

used 8.29 litres

Amount of water left 30 – 8.29 litres

- A car tank holds 40 litres of fuel. How many litres can three such cars hold?

One car 40 litres

Three cars 40 × 3 litres = 120 litres

- 36 litres of milk was given to 4 pupils to share. How much milk will each pupil get?

No of litres to share = 36 litres 9 litres

4√ 36

36

No of pupils to share it = 4

One pupil will get = 36 ÷ 4

**Exercise 3**

**Word problems**

- 3.6l of water is poured into a bucket that already contains 2.9l of water. How much

water is now in the bucket?

- A tank is full and it contains 30l of petrol. 12.72l of this is used. How much petrol is left

in the tank?

- Five friends shared 4l of fanta equally. How many litres did each receive?
- A station has only 92.4 litres of petrol left. This is shared equally by six customers.

How many litres of petrol will each customer receive?

- A trader sells 43 bottles of oil a day. Each bottle contains 0.6 litres of oil. How many

litres did she sell?

- Thirty-six children took 1.2 litres of water each with them on a journey. What was the

total capacity of water taken?

- A car uses 8.76 litres out of the 30.92l of petrol in the tank. What capacity of petrol is

left in the tank?

- A tanker emptied its water into two containers of 3 260 litres and 2 846 litres

respectively. What is the capacity of the tank?

- A bucket of water contain 7.2 litres of water when full. Equal amount is given to

four goats. What capacity of water will each goat drink?

- A driver bought 36.82 litres of petrol when traveling to Benin. On his way back he

bought 48.45 *ô*. What is the total capacity of petrol bought?

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