Ratios Simplifying Ratios Ratio Calculations.

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Presentation transcript:

Ratios Simplifying Ratios Ratio Calculations

Ratios What is a ratio ? Learning Intention Success Criteria 1. To understand what a ratio is and explain how we can sometimes simplify them. Understand the term ratio. . 2. Calculate and simplify basic ratios.

Ratios What is a ratio ? Ratios can be used to compare different quantities Example : There are 2 triangles and 3 rectangles. The ratio of triangles to rectangles is said to be 2 : 3 Note: The ratio of rectangles to triangles is said to be 3 : 2

Simplifying a ratio is like simplifying fractions Ratios Simplifying a ratio ? Simplifying a ratio is like simplifying fractions Fraction : Ratio :

Ratios Ratio Calculations Learning Intention Success Criteria 1. To show how to do ratio calculations. Use tabulating method to work out ratios. 2. Show appropriate working.

Ratios Ratio Calculations Example : The ratio of boys to girls is 4:5. If there are 16 boys, how many girls are there. boys girls 4 5 x 4 x 4 16 20

Ratios Ratio Calculations Example : The ratio of cars to buses is 3:7. If there are 49 buses, how many cars are there. cars buses 3 7 x 7 x 7 21 49