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6

2
In the term –3k mn, state the coefficient of
2
(a) k mn (b) – mn (c) 3k 2

2
2
(a) –3k mn = –3 × k mn (b) –3k mn = 3k × (–mn)
2
2
2
The coefficient of k mn is –3. The coefficient of –mn is 3k .
2
2
(c) –3k mn = –mn × 3k 2
2
The coefficient of 3k is –mn.
Self Practice 5.1d CHAPTER
1. Identify all the terms for each of the following algebraic expressions:
5
2
(a) 6k + 2k (b) x – 9xy
ab 7x
2
(c) + 2a – 5b (d) 4pq – + 8p q – 1
3 2
2
2. In the term –8xy , state the coefficient of
2
2
(a) xy (b) 8x (c) y (d) –x
What are like terms and unlike terms?
LEARNING
STANDARDS
3 pq
–2m and m and 6.9pq 6ab and 7ba 5k and – k 2 Identify like and
2
7 3 unlike terms.
Diagram (a)

Each pair of terms in Diagram (a) has the same variable with
the same power. The pair of terms is known as like terms.

1
2
2
2v and 2w 5xy and –yz 9x and 8x 3m n and mn 2
4
Discuss whether
Diagram (b) xy and 5x are like
y
2
Each pair of terms in Diagram (b) does not have the same terms or unlike terms.
variable with the same power. The pair of terms is known as
unlike terms.

7

Identify whether each of the following pairs of terms is like terms or unlike terms:
xy
2
(a) 4xy, (b) 12pq, 12pr (c) 3abc, 0.5bca (d) –7h, 6h
2

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Algebraic Expressions

05 TB Math F1.indd 111 11/10/16 12:13 PM