**The following activity is a practice exercise to help you measure your success under timed conditions. **

**If you are unsure of an answer, move on to the next question. **

**You should come back to questions you found difficult at the end if you have time. **

Let’s try one as a reminder and write the answer as a letter:

**If a = 4, b = 125, c = 3, d = 11 and e = 7, what is d (c x a) - e?**

Where there isn’t a -, +, x or ÷ between the first letter and the bracket, it means we have to multiply the outside number by what is in the brackets.

So the steps we follow are:

**c x a = 12**

**d x 12 = 132**

**132 - e = 125**

We must turn the number** 125 **back into a letter. This number corresponds to the letter** b**.

**Now it's time to begin this practice exercise. **

**Good luck!**