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How do you multiply and divide integers?
LEARNING
STANDARDS CHAPTER
4 Flip Multiply and divide
integers using various
Classroom
methods. Hence make 1
Aim: To explore the multiplication and division generalisation about
of integers. multiplication and
Instruction: • Explore by yourself before the lesson division of integers.
begins and discuss in groups of four
during the lesson.
• Open the folder downloaded from page vii.

1. Open and print the file Multiplication of integers table.pdf as shown in the diagram.
2. Complete the purple region for the
multiplication of positive integers that × –5 –4 –3 –2 –1 0 1 2 3 4 5
you have learnt. –5 0
–4 0
3. Complete the other regions in the table –3 0
according to the patterns of the numbers –2 0 –8
shown. –1 0 –4 –5
4. Present your findings about the patterns 0 0 0 0 0 0 0 0 0 0 0 0
of multiplication of integers shown. 1 –1 0 1 2 3 4 5
2 –4 –2 0 2 4 6 8 10
5. Discuss with your friends about the 3 0 15
patterns of division of integers. 4 0
6. Make a generalisation regarding the 5 0
multiplication and division of integers.

From the results of Exploration Activity 4, it is found that

Sign of the Sign of the
Operation Operation
product quotient
(+) × (+) + (+) ÷ (+) + Other than addition and
(+) × (–) – (+) ÷ (–) – subtraction of integers,
coloured chips can also
(–) × (+) – (–) ÷ (+) –
be used to perform
(–) × (–) + (–) ÷ (–) + multiplication and

division of integers.
In general, the rules of multiplication and division of Visit the site below for
integers can be summarized as follows. further information.
www.goo.gl/7j6CTd
The product or quotient of two integers with the same
signs is a positive integer.
The product or quotient of two integers with different
signs is a negative integer.

9
Rational Numbers

01 TB Math F1.indd 9 10/20/16 11:55 AM