Students learn how to solve an equation using the balance method and trial and improvement. As learning progresses they are taught how to form and solve a pair of simultaneous equations from known geometrical facts and real life problems. This unit takes place in Year 9 Term 5 and leads on to solving and representing inequalities and inequations.
How to introduce the sin, cos and tan trigonometric identities.
How to teach calculating the original amount after a percentage change.
The importance of the range when comparing comparing datasets.