Yr 7 Unit 6 Week 1 - Lesson 3

• Mathematics
• Lower Secondary (Key Stage 3)

Yr 7 Unit 6 - Week 1 - Lesson 3

Describe the commutative law and include an example

Explain what we mean by collecting like terms

Simplify the following expression by collecting like terms:
2a + 3b + 4a + 5b

1. 5a + 9b
2. 6a + 8b
3. 6a + 3b
4. 2a + 8b

DO NOW

In your exercise book:

TITLE - Unit 4 Week 1 - Lesson 3 DO NOW

INSTRUCTIONS - Write out the questions in your book and answer. 

NEW LEARNING

In your exercise book:

TITLE - Unit 4 Week 1 - Lesson 3 NEW LEARNING

INSTRUCTIONS - Copy the notes in this section into your book.

1. 6 x n + 6 x 2
2. 6(n + 2)
3. 6 + n x 6 + 2
4. 6n + 12

How would we expand the following expression 5(3 - n)

1. 5 x 3 - 5 x n
2. 5 x 3 - n
3. 5 - 5 x n
4. None of them

Expand the following expression
5(3 - n)

1. 15 - 3n
2. 15 - 5n
3. 5n - 15
4. 10n

Collect like terms for the following expression: a + 2a + 3a + 4a

1. 9a
2. 10a
3. 3a + 7a
4. a10

DEVELOP LEARNING

In your exercise book:

TITLE - Unit 4 Week 1 - Lesson 3 DEVELOP LEARNING

INSTRUCTIONS - Draw 3 arrays to show the expansion of:

1.  12(n - 1)
2.  12(10 - n)
3.   5(2n - 6)

DEVELOP LEARNING

1.  12(n - 1)

DEVELOP LEARNING

2.  12(10 - n)

DEVELOP LEARNING

3.  5(2n - 6)

When n = 3 which expression is the odd one out?
-2(5n + 3)

1. 2(n - 5)
2. -(n + 1)
3. 4(4 - n)
4. -4(n - 2)

Expand the expression. Which is the correct answer?
-2(5n + 3)

1. -10n + 5
2. -10n + 1
3. -10n + 6
4. -10n - 6

 We can ______________  an expression by using the

 _______________ property.

 For example, 3( n + ___ ) = ___   +   ___

Complete the following sentences by dragging the list of words into their correct positions. 

distribution

expand

3n

2

6