__Objective__

At the end of the topic the students should be able to:

- Know the strategies for finding the unknown in a problem.

Using the calculator saves time. It allows us to work out difficult and time consuming questions quickly.

**To solve a problem, use the following strategies;**

- Understand the situation.
- Read the description carefully. Underline key fact and what you are asked to find.
- Look for useful strategies.
- Follow your best strategy towards a solution.
- Show all the working clearly and explain your solution in a way that others can follow.

__Example 1__

Melanie buys 45 kilograms of flour to bake her birthday cake at a cost of $5.78 per 5 kg bag. Find the cost of the flour.

__Solution __

Number of bags: 45÷ 5 =9

Cost = 9× $5.78

=$52.02

Cost of the flour is **$52**

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