Ratio Proportion www mathsrevision com N 5 Num

Ratio & Proportion www. mathsrevision. com N 5 Num Ratio Calculations Sharing in a Ratio Direct Proportion Indirect Proportion 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com N 5 Num 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Ratio Calculations www. mathsrevision. com N 5 Num 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. 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Ratio Calculations N 5 Num www. mathsrevision. com Example : The ratio of boys to girls is 4: 5. If there are 16 boys, how many girls are there. boys girls x 4 07 -Oct-20 4 5 16 20 Created by Mr. Lafferty Maths Dept. x 4

Ratio & Proportion Ratio Calculations N 5 Num www. mathsrevision. com Example : The ratio of cars to buses is 3: 7. If there are 49 buses, how many cars are there. cars buses x 7 07 -Oct-20 3 7 21 49 Created by Mr. Lafferty Maths Dept. x 7

Ratio & Proportion www. mathsrevision. com N 5 Num Now try N 5 Lifeskills Ex 1 Ch 7 (page 64) Are you on Target ? I can ? 07 -Oct-20 Created by Mr. Lafferty Maths Department

Starter Questions www. mathsrevision. com N 5 Num 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Ratio & Proportional Division www. mathsrevision. com N 5 Num Learning Intention Success Criteria 1. We are learning to calculate proportional division. 07 -Oct-20 1. Solve problems using appropriate layout. 2. Show appropriate working. Created by Mr. Lafferty Maths Dept.

Ratio & Proportion www. mathsrevision. com N 5 Num 2 5 0 Proportional Division Example : Are we Make smaller expecting fraction more or less Bill and Ben share a raffle win of £ 400 in the ratio 3: 5. How much does each get ? Bill Raffles 8 3 Ben £ 250 07 -Oct-20 → → £ 400 Created by Mr. Lafferty Maths Dept. Check ! 150 + 250 = 400

Ratio & Proportion www. mathsrevision. com N 5 Num Proportional Division 6 Example : Ryan and Ross share 24 cakes in the ratio 3: 1. How many cakes does each get ? Are we Make smaller expecting fraction more or less Ratio 4 Ryan 3 Ross 07 -Oct-20 → → Cakes 24 6 Created by Mr. Lafferty Maths Dept. Check ! 18 + 6 = 24

Ratio & Proportion www. mathsrevision. com N 5 Num Now try N 5 Lifeskills Ex 2 Ch 7 (page 66) 07 -Oct-20 Created by Mr. Lafferty Maths Department

Starter Questions www. mathsrevision. com N 5 Num 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Direct Proportion www. mathsrevision. com N 5 Num Learning Intention Success Criteria 1. We are learning the term Direct Proportion. 1. Understand the idea of Direct Proportion. 2. Solve simple proportional problems. 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Proportion Direct Proportion www. mathsrevision. com N 5 Num Two quantities, (for example, number of cakes and total cost) are said to be in DIRECT PROPORTION, if : Are we “. . When you double the number of cakes Make smaller expecting you double the cost. ” fraction more or less : Example The cost of 6 cakes is £ 4. 20. Find the cost of 5 cakes. No. of cakes 6 5 07 -Oct-20 → → £ 4. 20 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Direct Proportion www. mathsrevision. com N 5 Num Example : Are we Make bigger expecting fraction more or less £ 30 50 07 -Oct-20 On holiday I exchanged £ 30 for $45. How many $ will I get for £ 50. → → $ 45 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Direct Proportion N 5 Num www. mathsrevision. com Example : 300 pencils cost £ 6. How much will 200 cost. Are we Make smaller expecting fraction more or less Pencil 300 200 07 -Oct-20 → → £ 6 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion www. mathsrevision. com N 5 Num Now try N 5 Lifeskills Ex 3 Ch 7 (page 67) 07 -Oct-20 Created by Mr. Lafferty Maths Department

Starter Questions www. mathsrevision. com N 5 Num y x x xx x x 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Inverse Proportion www. mathsrevision. com N 5 Num Learning Intention Success Criteria 1. We are learning the term Inverse Proportion. 1. Understand the idea of Inverse Proportion. 2. Solve simple inverse proportion problems. 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Inverse Proportion www. mathsrevision. com N 5 Num Inverse proportion is when one quantity doubles and the other halves. The two quantities are said to be INVERSELY PROPORTIONAL or (INDIRECTLY PROPORTIONAL) to each other. 07 -Oct-20 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Indirect Proportion N 5 Num www. mathsrevision. com Example : If it takes 3 men 8 hours to build a wall. How long will it take 4 men. Are we Make smaller expecting fraction more or less Men 3 4 07 -Oct-20 → → Hours 8 Created by Mr. Lafferty Maths Dept.

Ratio & Proportion Indirect Proportion www. mathsrevision. com N 5 Num Example : It takes 10 workers 12 months to build a house. How long should it take 8 men. Are we Make bigger expecting fraction more or less Workers 10 8 07 -Oct-20 → → Months 12 Created by Mr. Lafferty Maths Dept.

Have you updated your Learning Log ? Ratio & Proportion Indirect Proportion www. mathsrevision. com N 5 Num Now try Lifeskills Ex 4 Ch 7 (page 69) Are you on Target ? I can ? 07 -Oct-20 Are you on Target ? I can ? Created by Mr. Lafferty Maths Department