Have a go at these problems. As you do each one think about:
1. Find at least two different methods for making g the subject of the formula 5g + h = 23
Here are two ways - did you find others?
2. Work out the answer to 34 x 246 as many ways as you can.
Which of these methods do you prefer?
Have a look at the various solutions suggested by learners at Nrich.