Ratio
- 1. Find the multiples of the following numbers by skip counting (mental activity). 2 4 6 9
- 2. Number of red block Number of blue block 1 2 2 3 4 10 1 in every 3 blocks is red
- 3. Task Find out how many boys and girls are there in the classroom. Compare the number of boys to girls.
- 4. Objective: In today’s lesson you will express one value as a fraction of another given their ratio and vice versa
- 5. The Concept of Ratio PREPARED BY: JUDIEL B. MILAN
- 6. Questions: How many boys are there? How many girls are there? How many pupils are there in the class?
- 7. This time, we will compare the number of boys and girls in the classroom 20 10 Boys Girls
- 9. Compare the number of boys to the number of girls Use the concept of ratio We can say that the ratio of boys to girls in the classroom is 20 is to 10.
- 10. Other ways to express ratio are the following: • word form - 20 is to 10 • colon form - 19:15 • fraction form - 20/10
- 11. 20 boys 15 girls 2:1 The answer in ratio should always be reduced to lowest term or simplest form.
- 12. 20 boys 15 girls 2:1 Therefore, we say that in every 2 boys there is 1 girl
- 13. Group Activity 1) 10 guavas to 5 santol 2) 12 eggplants to 3 baskets 3) 600 pupils to aSD20 classroom 4) 20 corns to 14 sweet potatoes 5) 6 bottles of sinamak to 16 bottles of dayok
- 14. F G’;OFD Guide questions: How did you find the activity? How did you compare the two quantities? How did you express your answer?
- 15. Pair Activity 1) 16 papayas to 4 mangoes 2) 18 ampalaya to 3 baskets 3) 300 boys to 10 girls 4) 25 carrots to 15 radish 5) 8 cans of milk to 14 cans of sardines
- 16. Ponder! What is ratio? How do we express ratio?
- 17. Ratio Ratio is a comparison of two or more quantities which can be written in word, colon and fraction form.
- 18. Try this! You solved 15 out of 20 problems correctly. What is the ratio of the correct answers to the number of wrong answers?
- 19. Individual Activity 1)18 avocados to 8 babana 2)20 tomatoes to 4 onions 3)100 adults to 15 children 4)24 singkamas to 3 baskets 5)9 bottles of bagoong to 15 bottles of ginamos
- 20. Assignment 1) 15 atis to 5 star apple 2) 21 male to 3 female 3) 32 basketball to 12 volleyball