Lesson Notes By Weeks and Term - Primary 6

MULTIPLICATION

WEEK 9

SUBJECT: MATHEMATICS

TERM: 1ST TERM

CLASS PRIMARY 6

TOPIC: MULTIPLICATION

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

�multiply 3-digit by 3-digit numbers

�Multiply 4- and 5-digit numbers by 1-digit numbers

Multiply 4- and 5-digit numbers by 2-digit numbers

Solve word problems on multiplication of whole numbers

CONTENT

MULTIPLYING 3-DIGITS NUMBER

Examples

��������������������� 7 4 2 6 6

������ 1 1 3 7 1 2

Exercise

Simplify the following multiplications.

706�566

  1. 793�107 6. 568� �679 8. 462�
  2. 771�248 10. 224�327 11. 792� �318

2 Multiplying 4- and 5-digit numbers by 1-digit number

Examples

  • 2

1.3 461נ������������������ 1

��������������� �4

  • 3 8 4 4

��������������������������������������

  • 4 6 3

���� ����������������������������������� נ���

����������������������� 5 0 0 6 7 2

Unit �

Exercise�

  1. 34 946 ��5 4. 17 634 �� 6
  2. 2 296 �� 8 6. 4 837 �� 5 7. 9473 �� 4 8. 63 485 �� 3
  3. 98 765 �� 2 10. 7 799 �� 9 11. 57 330 �� 6 12. 1 984 � 8

Unit 3 Multiplying 4- and 5-digit numbers by 2-digit numbers

Examples

  1. 2 635 �� 43 = 2 6 3 5

������������ ���������������������� 4 3

������������������������ 7 9 0 5 = 2 635 �� 3

���������������������� + 1 0 5 4 0 0 = 2 635 �� 40

������������������������ 1 1 3 3 0 5 = 2 635 �� 43

  1. 72 548 �� 56 = 7 2 5 4 8

נ������������������������������������ � 5 6

�� ������������������������4 3 5 2 8 8 = 72 548 �� 6

  • 6 2 7 4 0 0 = 72 548 �� 50
  • 0 6 2 6 8 8 = 72 548 �� 56

Exercise Simplify these.

  1. 5 302 �� 25 2. 33 648 �� 55 3. 74 629 �� 48 4. 9 988 �� 37
  2. 68 305 �� 94 6. 14 736 �� 66 7. 7 239� � 39 8. 24 361 � 87
  3. 6 783 �� 94 10. 32 588 � �65 11. 17 430 �� 76 12. 5 899� � 55

�Word problems

Examples

Study this example to find out how the following word problem was solved: A poultry farm produces 2 568 eggs a day. How many eggs will it produce in 28 days?

Number of eggs produced per day = 2 568

Number of eggs produce in 28 days = 2 568 �28 eggs

����������� ����������������������������������������������������= 2 5 6 8

��������������������������� ���������������������������������������������� 2 8

������������������������������������������������������������� 2 0 5 4 4 = 2 568 �� 8

�������������������������� ������������������������������������5 1 3 6 0 = 2 568 � �20

����������������������������� ����������������������������������7 1 9 0 4 eggs

Exercise 1

  1. There are 125 rows of chairs in a theatre. Each row has 135 chairs. How many chairs are there in the theatre?

89

  1. The net weight of a bag of sugar is 4 742 g. Find the net weight of 26 bags of sugar.
  2. A drum holds 224 litres of water. Find the amount of water in a tank filled 35 times with the drum.
  3. A man earns 95 350.00 a week. How much will he earn in 37 weeks?
  4. A book has 145 lines per page. How many lines are there if the book has 125 pages?

MULTIPLICATION OF MIXED FRACTION

FIG. 1

FIG. 2

Exercise 2

Word problems

  1. A rectangular field is 147 metres long and 126.7 metres wide. What is its area in square metres?
  2. Find the cost of 36.6 kg of beef at 314 per kilogram.
  3. The net weight of a packet of sugar is 474.2 g. Find the total net weight of 26 packets of sugar.
  4. A keg holds 22.4 litres of water. Find the amount of water in a drum filled 40 times with the keg.
  5. The propeller plane flies 26.512 kilometres per hour. Calculate the distance it can cover in 2 days.
  6. Find the total height of 12 tins each measuring 3 2/3


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