Topics
6. Multiplication and division
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Australia
Year 3

PRACTICE: Multiplication

Lesson
Practice
Lesson

Practice multiplication

We have been learning some ways to build our multiplication skills. These include:

  • using  repeated addition 
  •  making arrays  to show equal sized groups
  •  noticing patterns  , such as doubling and skip-counting

We also worked on some time tables, including:

  •  multiplying by 0 or 1 
  •  multiplying by 2 
  •  multiplying by 4 
  •  multiplying by 3 
  •  multiplying by 10 
  •  multiplying by 5 

Examples

Example 1

Find the product of 2\times 8.

Worked Solution
Create a strategy

This can be thought of as 2 groups of 8 stars, as represented in the picture below.

The image shows 2 circles with 8 stars each inside.
Apply the idea

In the above image there are 16 stars in total.2 \times 8 = 16

Example 2

Find the value of 6\times3.

Worked Solution
Create a strategy

We can think of 6\times 3 as 6 groups of 3 just like in the image below that has 6 groups of 3 squares:

The image shows 6 rows of 3 squares.
Apply the idea

The above image has 18 squares in total.

6 \times 3 = 18

Example 3

Find the value of 5\times9.

Worked Solution
Create a strategy

We can think of 5\times 9 as 5 groups of 9 just like in the image below that has 5 groups of 9 squares:

The image shows 5 rows of 9 squares.
Apply the idea

The above image has 45 squares in total.

5 \times 9 = 45

Idea summary

There are different ways to solve multiplication, including repeated addition and using arrays. We can also multiply our numbers in a different order, so 3 \times 4 has the same answer as 4 \times 3.

Outcomes

ACMNA056

Recall multiplication facts of two, three, five and ten and related division facts

ACMNA057

Represent and solve problems involving multiplication using efficient mental and written strategies and appropriate digital technologies

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