In this activity, you will need to use the skills you have previously practised when adding and subtracting fractions.

You will also be asked to add **mixed numbers**.

Let's recap.

**Adding and subtracting fractions:**

When we add or subtract fractions, we try to get them to have the same denominators.

We do this by using **lowest common multiples.**

For example, if we want to subtract:

We look for the smallest number that 11 and 5 will go into.

This will be 55 because this is the lowest common multiple of 11 and 5.

11 x 5 = 55 5 x 11 = 55

So we change both fractions into 55ths.

We multiply the numerator and the denominator of by 5:

We multiply the numerator and the denominator of by 11:

So now we have:

Answer =** **

**Adding or Subtracting Mixed Numbers**

Adding or subtracting mixed numbers involves four steps.

**1. Add or subtract the whole numbers**

3 + 7 = 10

**2. Add or subtract the fractions.**

The lowest common multiple is 45 so first convert both fractions to 45ths.

**3. Can you simplify the answer?**

Yes! Both numbers can be divided equally by 3:

**42/45 = 14/15**

**4. **The final piece of the puzzle!

**We add the whole number from step 1 and the fraction from step 3 together.**

Now let's have a go at some questions.