Second Term Lesson Note for Week Nine
Class : Primary Four
Subject : Mathematics
Topic : Money (Multiplication and Division)
Duration : 80 Minutes
Period : Double Period
Reference Book :
- New Method Mathematics for Primary Schools, Book 4, by Learn Africa.
- Lagos State Unified schemes of work for Upper Primary School, Primary 4 – 6.
- Online Resources
Instructional Material : Chart showing the multiplication tables of numbers
Learning Objectives : By the end of the lesson learners will be able to :
i. Perform multiplication of money
ii. Perform division of money
iii. Solve word problems on multiplication and division of money.
Content :
PROBLEM ON MULTIPLICATION OF MONEY
EXAMPLE
Multiplication involving money
Examples
1. 65k × 8 = 520k = N 5. 20k
2. N11 . 24 × 6 = #67 . 44
N11 . 24
× 6
#67 . 44
Note: The naira sign has two digits to the right of the decimal point in these examples.
Exercise 1
Simplify the Following
the examples.
1. 199k × 6
2. 186k × 8
3. 159k × 4
4. 167k × 7
5. 148k × 13
6. 154k × 19
7. N32. 66 x 7
8. N13. 25 x 8
9. #27.04 × 5
10. #76.21 × 10
Find the cost of 3 books at N91.55 each.
Solution :
N 9 1. 5 5
× 3
N274 . 6 5
Exercise 2
Find the cost of these items.
1. 5 meters of white poplin at N320.00 per meter.
2. 20 kg of yam flour at N 150.00 per kg.
3. Taxi fare for 16 people at N 150.00 per person.
4. 9 school chairs at 300 Naira per chair.
5. 8 school uniforms at N955.00 per uniform.
6. A man earns N535.00 a day. How much does he earn in
i. 2 days ii. 6 days
iii. 9 days iv. 10 days
7. A trader sells a packet of rulers for N625.00 each. How much money does he receive if he sells
i. 3 packets of rulers? ii. 5 packets of rulers
DIVISION OF MONEY
Divide money by a whole number.
Examples
1. #1.68 ÷ 7 = #0.24
or 168/ 7 k = 24k
2. Divide 18.24 by 8
# 2 . 2 8
8 √#1 8.2 4
– 1 6 ↓ (16 x 1)
2 2 ↓
– 1 6 ↓ (16 x 1)
6 4
– 6 4. (16 x 4)
0 0
3. Four children were given #624.40 to share equally. how much will each of them get?
Solution :
Note that N624.00 = 62400k
= N624.00 ÷ 4
= N156.10
Unit 3 : Division involving money
Exercise 3
Follow the examples and work out the following problems.
1. 119 ÷ 7
2. 2 Naira 25 kobo ÷ 9
3. 16.50 ÷ 30
4. 38.40 ÷ 6
5. 42 ÷ 20
6. 1 610k ÷ 5
7. 29.04 ÷ 4
8 . 10 Naira 23 kobo ÷ 3
9. 17 Naira ÷ 10
10. 98 Naira 1 kobo ÷ 9
Find the cost of one item.
11. 10 lollipops cost 150.00
12. 8 eggs 240.00
13. 9 safety pins cost 27.63
14. 7 sports shorts cost 1 520.
15. 20 cups of garri cost 650.00
16. Six children paid the same amount of money totaling 1 605.00 to travel on a bus. How much did each child contribute?
17. The cost of petrol for eight return journeys from village to a town is 2 000.00. What is the cost of petrol for one return journey?
18. Puzzle corner
A hen and 7 chickens cost #1 720.00. The same hen and 10 similar chickens cost # 2 140.
Find the cost of :
a chickens
Mixed exercises on multiplication and division of money
Examples :
13 naira 50 kobo x 8 ÷ 10
N1 3. 50
x 8
10 8 . 0 0 ÷ 10 =
#10. 80
Exercise 4
Copy and complete this table.
Money Multiply by Divide by
1. (185 kobo x 6) ÷ 7
2. (13 naira 5 0 kobo x 8) 5
3. (#16.24 ÷ 4) x 8
4. # 25.40 x 20 ÷ 10
5. 9 Naira 90 kobo ÷ 9 x 7
Find the cost of these.
6. 5 notebooks at 45.00 each
7. 20 litters of petrol at 97 per liter
8. 38 meals at 300.00 per meal
9. 8 pens at 250 each and 4 bottles of ink at 120 per bottle
10. 6 pairs of shorts 1 850 per pair of shorts and 5 shirts at 1 950.00 per shirt
Find the cost of :
(a) one short and
(b) one shirt
ASSIGNMENT :
EXERCISE
1. N5.52 x 4
2. N5.91 x 8
3. N12.37 x 6
4. A bag of salt costs N585.40. how much will I pay for 5 bags?
5. What is the cost of 6 meters of while poplin at N212. 85 per meter?
6. Find the cost of 7 chairs if one chair costs N423.50
7. Divide N1.68 by 4
8. Divide N2.25 by 9
9. Divide N44.80 by 8
10. Divide N11.76 by 7
11. Five boys are to share N615.55 equally. How much will each receive?
12. 10 torch batteries at 125.00. What is the cost of one battery
12. 9 metres of chino material costs N 1, 774.80. 1metre will cost?
13. 7 head ties cost #2, 200.00
14. 6 pieces of plantain cost 420 Naira 60 kobo
15. 4 erasers cost 42.80
Two pencils cost 16.36 and three baskets cost 335.00.
16. Find the cost of 1 pencil.
17. What is the cost of 3 pencils?
18. What is the cost of 5 pencils?
19. What is the cost of 5 baskets?
20. Find the cost of 7 baskets.