MATH - RATIO (CLASS V)
β’Download as PPTX, PDFβ’
2 likesβ’35 views
MATH - RATIO (CLASS V) INTERNATIONAL BOARD RATIO REPRESENTATION OF RATIO EQUOVALENT FRACTION FRACTION, DECIMAL, RATIO CONVERSION
Recommended
More Related Content
What's hot
What's hot (16)
Similar to MATH - RATIO (CLASS V)
Similar to MATH - RATIO (CLASS V) (20)
More from Pooja M
More from Pooja M (20)
Recently uploaded
Recently uploaded (20)
MATH - RATIO (CLASS V)
- 2. Rita Pamela
- 3. Rita collected 21 flowers. Pamela collected 42 flowers. Flowers collected by Pamela β Flowers collected by Rita 42 flowers β 21 flowers = 21 flowers This type of comparison is called comparison by difference.
- 4. Rita collected 21 flowers. Pamela collected 42 flowers. ππππππππ πππππππππ ππ πΉπππ ππππππππ πππππππππ ππ π·πππππ = ππ ππ = π π Rita has collected π π the number of flowers of what pamela has collected.
- 5. Rita collected 21 flowers. Pamela collected 42 flowers. ππππππππ πππππππππ ππ π·πππππ ππππππππ πππππππππ ππ πΉπππ = ππ ππ = π π Pamela has collected twice the number of flowers that what Rita has collected.
- 6. Rita collected 21 flowers. Pamela collected 42 flowers. ππ ππ = π π ππ ππ = π π Rita has collected π π the number of flowers of what pamela has collected. Pamela has collected twice the number of flowers that what Rita has collected. This is known as comparison by division.
- 8. Comparison by division is called Ratio. RATIO In other word, Ratio is a Comparison of two or more quantities of the same kind by division.
- 9. Can the following measures be compared with a ratio? 6 yellow fish in an aquarium with 18 fish Can the following measures be compared with a ratio? 6 yellow fish in an aquarium with 18 fish YES Soniaβs weight and the number of girls in her class Can the following measures be compared with a ratio? 6 yellow fish in an aquarium with 18 fish YES Soniaβs weight and the number of girls in her class NO Number of matchsticks in a matchbox and number of matchsticks in a carton full of matchboxes Can the following measures be compared with a ratio? 6 yellow fish in an aquarium with 18 fish YES Soniaβs weight and the number of girls in her class NO Number of matchsticks in a matchbox and number of matchsticks in a carton full of matchboxes YES The size of an ice cube in cm and the temperature inside the freezer in degree Celsius Can the following measures be compared with a ratio? 6 yellow fish in an aquarium with 18 fish YES Soniaβs weight and the number of girls in her class NO Number of matchsticks in a matchbox and number of matchsticks in a carton full of matchboxes YES The size of an ice cube in cm and the temperature inside the freezer in degree Celsius NO
- 10. Representation of a Ratio. There are three ways of representing a Ratio. In fraction form Using colon (:) Using the word βtoβ
- 11. Representation of a Ratio. In fraction form ππ ππ = π π ππ ππ = π π
- 12. Representation of a Ratio. Using the word βtoβ π π = 1 to 2 π π = 2 to 1
- 13. Representation of a Ratio. Using βcolonβ π π = 1 : 2 π π = 2 : 1
- 14. Do you know????? If βaβ and βbβ are any two number, then a : b First term or Antecedent Second term or Consequent
- 15. Example β’ In a fruit basket, there are 20 oranges and 10 pomegranates. Express it in the form of a ratio. Solution: In ratio of the number of oranges to the number of pomegranates is: Using colon (:) 20 : 10 Using the word βtoβ 20 to 10 In fractional form ππ ππ
- 16. Ratio in simplest form If βaβ and βbβ are any two numbers, then βa : bβ is said to be its lowest form or simplest form, if a and b have no common factors except 1.
- 17. To express a ratio in its simplest form a) Write the ratio as a fraction b) Divide the numerator and denominator by their HCF c) The answer is a fraction in its lowest form STEPS
- 18. Example Express the ratio 24 : 9 in its simplest form Solution: Step 1 - Write the ratio as a fraction Ratio = ππ π Step 3 - The answer is a fraction in its lowest form = π π = 8 : 3 Step 2 - Divide the numerator and denominator by their HCF = ππ / π π / π Hence, the ratio of 24 and 9 in its simplest form is 8 : 3
- 19. Express the following ratios in their simplest forms. 15 and 3 Express the following ratios in their simplest forms. 15 and 3 ππ π Express the following ratios in their simplest forms. 15 and 3 ππ π = ππ Γ·π π Γ·π Express the following ratios in their simplest forms. 15 and 3 ππ π = ππ Γ·π π Γ·π = π π Express the following ratios in their simplest forms. 15 and 3 ππ π = ππ Γ·π π Γ·π = π π = 5 : 1 Express the following ratios in their simplest forms. 15 and 3 ππ π = ππ Γ·π π Γ·π = π π = 5 : 1 12 and 6 Express the following ratios in their simplest forms. 15 and 3 ππ π = ππ Γ·π π Γ·π = π π = 5 : 1 12 and 6 ππ π = ππ Γ·π π Γ·π = π π = 2 : 1 80 and 10 Express the following ratios in their simplest forms. 15 and 3 ππ π = ππ Γ·π π Γ·π = π π = 5 : 1 12 and 6 ππ π = ππ Γ·π π Γ·π = π π = 2 : 1 80 and 10 ππ ππ = ππ Γ· ππ ππ Γ·ππ = π π = 8 : 1 180 and 120 Express the following ratios in their simplest forms. 15 and 3 ππ π = ππ Γ·π π Γ·π = π π = 5 : 1 12 and 6 ππ π = ππ Γ·π π Γ·π = π π = 2 : 1 80 and 10 ππ ππ = ππ Γ· ππ ππ Γ·ππ = π π = 8 : 1 180 and 120 πππ πππ = πππ Γ·ππ πππ Γ·ππ = π π = 3 : 2
- 20. Brain storming In a class, there are 20 boys and 40 girls. a) Find the ratio of the number of boys to the number of girls. b) Find the ratio of the number of boys to the total number of students. c) Find the ratio of the number of girls to the total number of students. d) Find the ratio of the number of students to the total number of girls.
- 21. Brain storming In a class, there are 20 boys and 40 girls. a) Find the ratio of the number of boys to the number of girls. The ratio of the number of boys to the number of girls = ππ ππ Solution : The number of boys = 20 The number of girls = 40 = ππ ππ ππ ππ = π π = 1 : 2
- 22. Brain storming In a class, there are 20 boys and 40 girls. b) Find the ratio of the number of boys to the total number of students. The ratio of the number of boys to the number of students = ππ ππ Solution : The number of boys = 20 Total number of students = 20 + 40 = 60 = ππ ππ ππ ππ = π π = 1 : 3 Therefore, the ratio of the number of boys to the number of girls is 1 : 3 in simplest form.
- 23. Brain storming In a class, there are 20 boys and 40 girls. c) Find the ratio of the number of girls to the total number of students. The ratio of the total number of girls to the number of students = ππ ππ Solution : The number of girls = 40 Total number of students = 20 + 40 = 60 = ππ ππ ππ ππ = π π = 2 : 3 Therefore, the ratio of the number of boys to the number of students is 2 : 3 in simplest form.
- 24. Brain storming In a class, there are 20 boys and 40 girls. d) Find the ratio of the number of students to the total number of girls. The ratio of the total number of students to the number of girls = ππ ππ Solution : The number of girls = 40 Total number of students = 20 + 40 = 60 = ππ ππ ππ ππ = π π = 3 : 2 Therefore, the ratio of the number of students to the number of girls is 3 : 2 in simplest form.
- 25. Determine the ratio of triangles to cube in the rows A, B,C and D. State which two rows have the same ratio. A B C D
- 26. Determine the ratio of triangles to cube in the rows A, B,C and D. State which two rows have the same ratio. A π π = π π B π π C π π = π π D π π = π π
- 27. Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ 120 : 200 Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ 120 : 200 Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ 120 : 200 120 to 200 Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ 120 : 200 120 to 200 π π Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ 120 : 200 120 to 200 π π 8 hours to 12 hours Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ 120 : 200 120 to 200 π π 8 hours to 12 hours π ππ Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ 120 : 200 120 to 200 π π 8 hours to 12 hours π ππ 8 : 12 8 to 12 Express the following as ratios in different ways. Fraction Ratio Read as Simplest form 3 Km to 5 Km π π 3 : 5 3 to 5 π π 50 marks to 20 marks ππ ππ 50 : 20 50 to 20 π π Rs 120 to Rs 200 πππ πππ 120 : 200 120 to 200 π π 8 hours to 12 hours π ππ 8 : 12 8 to 12 π π
- 28. RECAP β’ Ratio is a comparison of two or more quantities of the same kind by division. β’ There are three ways of representing a ratio. In fraction form Using the word βtoβ Using colon ( : ) β’ If a and b are any two numbers, then a is said to be first term or antecedent and b is said to be second term or consequent.
- 29. MEMORY MATCH 4:2 π π 2:6 π π 8:7 π π 9:2 π π 1:3 π π
- 30. There are 36 bananas,12 oranges and 24 apples in a basket. Write down the: a) Ratio of apples to oranges b) Ratio of bananas to oranges and apples c) Ratio of oranges to remaining