Before you practice the times tables from 0 to 10, take some time to review the 2 and 4 times tables , as well as the 5 and 10 times tables . Remember we can use strategies we've learnt in some of our earlier times tables, including:

double (\times \,2) and double, double (\times \,4)
halving the 10 times tables to work out (\times \,5)

We also looked at how to solve the 8 times tables , 3 times tables , 6 times tables , 7 times tables and 9 times tables .

Examples

Example 1

Find the value of 8 \times 3.

Worked Solution

Create a strategy

This can be thought of as 8 groups of 3 squares, as represented in the image below.

The image shows eight rows of three squares.

Apply the idea

There are 24 squares in the above image.8 \times 3 = 24

Reflect and check

Or we can use the double, double, double strategy on 3 to get:

\displaystyle 3 \times 2	\displaystyle =	\displaystyle 6	Double 3
\displaystyle 6 \times 2	\displaystyle =	\displaystyle 12	Double the answer
\displaystyle 12 \times 2	\displaystyle =	\displaystyle 24	Double the answer again

Which means: 8 \times 3 = 24

Example 2

Find the product of 3\times 5.

Worked Solution

Create a strategy

We can think of 3 \times 5 as 3 groups of 5. The image shows 3 groups of 5 squares:

Apply the idea

There are 15 squares in the above image.3 \times 5 = 15

Reflect and check

We can also multiply 3 by 10 then halve the answer.

\displaystyle 3\times 10	\displaystyle =	\displaystyle 30	Multiply by 10
\displaystyle 3\times 5	\displaystyle =	\displaystyle 15	Halve 30

Example 3

Find the value of 6\times10.

Worked Solution

Create a strategy

We can think of 6\times 10 as 6 groups of 10 just like in the image below that has 6 groups of 10 squares:

Apply the idea

The above image has 60 squares in total.

6 \times 10 = 60

Reflect and check

A short cut when multiplying a whole number by 10 is to just add a zero to the end of the number.

\displaystyle 6\times 10

\displaystyle =

\displaystyle 60

Add a zero

Idea summary

Multiplication looks at equally sized groups. You can use different strategies to work them out.

Outcomes

AC9M4A02

recall and demonstrate proficiency with multiplication facts up to 10 x 10 and related division facts; extend and apply facts to develop efficient mental strategies for computation with larger numbers without a calculator

PRACTICE: Multiplication

Ideas