Lesson Notes By Weeks and Term - Primary 4

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:

1. Multiply in liter by whole
2. Divide in liter by whole
3. 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

7. 5.6 l× 5. 8. 6.2 l× 6      9. 8.0l × 8    10. 1.7l × 9
8. 15 · 6l

        × 2

12. 27 · 9 l

         × 8

13. 36 · 3 l

         × 7

14. 47 · 9 l

         × 6

15. 54 · 8l

        × 9

16. 68 · 4l

         × 3

17. 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.

1. 4.8 l ÷ 4. 2. 8.4 l ÷ 6   3. 7.2l  ÷ 9.   4. 8.0  ÷ 5
2. 91.6/2l 6. 74.7 /3. 7. 41.6/8l 8. 53.6 /4
3. 3√ 17.1l 10. 7 √37.8l 11. 9 √66.6l 12. 5√ 89.5l
4. Divide 63.7l by 7 14. Divide 83.2l by 8

Examples

Word problems on capacity

1. 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

2. 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

3. 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

4. 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

1. 3.6l of water is poured into a bucket that already contains 2.9l of water. How much

water is now in the bucket?

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

in the tank?

3. Five friends shared 4l of fanta equally. How many litres did each receive?
4. 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?

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

litres did she sell?

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

total capacity of water taken?

7. 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?

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

respectively. What is the capacity of the tank?

9. 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?

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

bought 48.45 􀆐. What is the total capacity of petrol bought?