In this activity, we will learn to use simple multiplication facts to allow us to find answers to decimal multiplications.

**Example**

We can easily work out that 166 × 4 = 664

So, can we use that to work out 166 x 0.04?

**Answer**

We know that 166 × 4 = 664

We can divide 4 by 100 to get 0.04, so we must also divide the 664 by 100 to give 6.64

So 166 × 0.04 =** 6.64**

**Example 2**

We can easily work out that 259 x 3 = 777

We can use that fact to find out 259 x 0.3

**Answer**

We know that 259 x 3 = 777

We can divide 3 by 10 to get 0.3, so we must divide 777 by 10 to give 77.7

So 259 x 0.3 =** 77.7**

One useful tip is to** check your answer **makes sense!

Count how many decimal places there are in both the calculation and the answer. **There should be the same number of decimal places in both**.

E.g. 0.004 x 53 has **three decimal places**, so the answer must have three decimal places too: 0.212. It does!

Now it's your turn to have a go.