 # www mathsrevision com Ratios Simplifying Ratios Ratio Calculations

• Slides: 15 www. mathsrevision. com Ratios Simplifying Ratios Ratio Calculations 23 -Feb-21 Created by Mr. Lafferty Maths Dept. www. mathsrevision. com Starter Questions 23 -Feb-21 Created by Mr. Lafferty Maths Dept. Ratios www. mathsrevision. com What is a ratio ? Learning Intention Success Criteria 1. We are learning what a ratio. 23 -Feb-21 1. Understand the term ratio. . Created by Mr. Lafferty Maths Dept. Ratios What is a ratio ? www. mathsrevision. com 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 23 -Feb-21 Created by Mr. Lafferty Maths Dept. www. mathsrevision. com Ratio Now try TJ 3 a Ex 1 Ch 11 (page 96) 23 -Feb-21 Created by Mr. Lafferty Maths Department www. mathsrevision. com Starter Questions 23 -Feb-21 Created by Mr. Lafferty Maths Dept. Ratios www. mathsrevision. com What is a ratio ? Learning Intention Success Criteria 1. We are learning to simplify a ratio. 23 -Feb-21 1. Be able to find the HCF to simplify a ratios. Created by Mr. Lafferty Maths Dept. HCF Highest Common Factor Ratios www. mathsrevision. com Simplifying a ratio ? To simplify a ratio we need to find the HCF = 2 ÷ 2 HCF = 4 ÷ 2 ÷ 4 3 : 4 23 -Feb-21 ÷ 4 3 : 7 Created by Mr. Lafferty Maths Dept. Ratios www. mathsrevision. com Simplifying a ratio ? To simplify a ratio we need to find the HCF = 4 ÷ 4 13 : 1 23 -Feb-21 HCF = 5 ÷ 5 16 : 5 Created by Mr. Lafferty Maths Dept. HCF = 4 ÷ 4 18 : 5 www. mathsrevision. com Ratio Now try TJ 3 a Ex 2 Ch 11 (page 98) 23 -Feb-21 Created by Mr. Lafferty Maths Department www. mathsrevision. com Starter Questions 23 -Feb-21 Created by Mr. Lafferty Maths Dept. Ratios www. mathsrevision. com Ratio Calculations Learning Intention 1 Success Criteria We are learning how to do ratio calculations. 1. Apply tabular method to solve problems involving ratios. 2. Show appropriate working. 23 -Feb-21 Created by Mr. Lafferty Maths Dept. Ratios www. mathsrevision. com 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 23 -Feb-21 4 5 16 20 Created by Mr. Lafferty Maths Dept. x 4 Ratios www. mathsrevision. com 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 23 -Feb-21 3 7 21 49 Created by Mr. Lafferty Maths Dept. x 7 www. mathsrevision. com Have you updated your Learning Log ? Ratio Now try TJ 3 a Ex 3 Ch 11 (page 100) Are you on Target ? I can ? 23 -Feb-21 Created by Mr. Lafferty Maths Department