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19-Dec-14Created by Mr. Lafferty Maths Dept. Simplifying Ratios Ratio Calculations Ratios www.mathsrevision.com MNU 3-08a MNU 4-08a.

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Presentation on theme: "19-Dec-14Created by Mr. Lafferty Maths Dept. Simplifying Ratios Ratio Calculations Ratios www.mathsrevision.com MNU 3-08a MNU 4-08a."— Presentation transcript:

1 19-Dec-14Created by Mr. Lafferty Maths Dept. Simplifying Ratios Ratio Calculations Ratios MNU 3-08a MNU 4-08a

2 19-Dec-14Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions MNU 3-08a MNU 4-08a

3 19-Dec-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.Understand the term ratio.. 1. We are learning what a ratio. Ratios 2.Calculate and simplify basic ratios. What is a ratio ? MNU 3-08a MNU 4-08a

4 19-Dec-14Created by Mr. Lafferty Maths Dept. Ratios Ratios can be used to compare different quantities What is a ratio ? 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 MNU 3-08a MNU 4-08a

5 19-Dec-14Created by Mr. Lafferty Maths Dept. Ratios Simplifying a ratio is like simplifying fractions Simplifying a ratio ? Fraction : Ratio : MNU 3-08a MNU 4-08a

6 19-Dec-14Created by Mr. Lafferty Maths Dept. Now try Exercise 1&2 Ch15 (page 175) Ratios Simplifying a ratio ? MNU 3-08a MNU 4-08a

7 19-Dec-14Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions 1432a b MNU 3-08a MNU 4-08a

8 19-Dec-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.Apply tabular method to solve problems involving ratios. 1 We are learning how to do ratio calculations. Ratios 2.Show appropriate working. Ratio Calculations MNU 3-08a MNU 4-08a

9 19-Dec-14Created by Mr. Lafferty Maths Dept. 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 x 4 x 4 MNU 3-08a MNU 4-08a

10 19-Dec-14Created by Mr. Lafferty Maths Dept. 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 x 7 x 7 MNU 3-08a MNU 4-08a

11 19-Dec-14Created by Mr. Lafferty Maths Dept. Now try Exercise 3 Ch15 (page 179) Ratios Ratio Calculations MNU 3-08a MNU 4-08a


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