In this activity, we will be multiplying a two-digit number by a one-digit number.

To do this, we need to **partition** the two-digit number into its place value.

So, let's try multiplying **22 by 7**.

The first step is to **partition** 22.

22 can be partitioned into **20** and **2**.

The next step is to **multiply** the ones and tens by 7.

2 × 7 = **14**

20 × 7 = **140**

The final step is to **add **the **products** together.

140 + 14 = **154**

So, 22 × 7 = 154

Let's try an example question together.

**Example**

Work out the missing number:

23 × 4 =

**Answer**

We are trying to work out **23 lots of 4**.

23 can be partitioned into **20 **and **3**.

So we work out **20 lots of 4** and then **3 lots of 4**.

20 × 4 = **80**

3 × 4 = **12**

Now **add** the products together.

80 + 12 = **92**

So, 23 × 4 = **92**

Now you've seen the method to use, it's your turn to try some questions.