Understanding Ratios for Simplifying Calculations
Learn about ratios, how to simplify them, and perform ratio calculations with examples. Understand the concept of ratios and how they are used to compare quantities in a straightforward manner. Explore methods to simplify ratios like fractions and apply tabulating methods for ratio calculations. Practice calculating ratios with different scenarios involving boys, girls, cars, and buses.
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Presentation Transcript
Ratios Simplifying Ratios Ratio Calculations
Ratios What is a ratio ? Learning Intention Success Criteria 1. Understand the term ratio. . 1. To understand what a ratio is and explain how we can sometimes simplify them. 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
Ratios Simplifying a ratio ? Simplifying a ratio is like simplifying fractions 6 8 6 8 3 4 2 Fraction : = = 2 Ratio : 6 : 8 = 6 : 8 = 3 : 4 2 2
Ratios Ratio Calculations Learning Intention Success Criteria 1. Use tabulating method to work out ratios. 1. To show how to do ratio calculations. 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 16 5 20 x 4 x 4
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 21 7 49 x 7 x 7
