Using ratio's to divide quantities

Good morning!
Schedule: 
  • Learning goals 
  • Introduction questions
  • Using ratio's to divide quantities
  • Step by step plan
  • Work + Blooket
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Slide 1: Slide
WiskundeMiddelbare schoolvwoLeerjaar 2

This lesson contains 16 slides, with interactive quiz and text slides.

time-iconLesson duration is: 60 min

Items in this lesson

Good morning!
Schedule: 
  • Learning goals 
  • Introduction questions
  • Using ratio's to divide quantities
  • Step by step plan
  • Work + Blooket

Slide 1 - Slide

Learning goals 
At the end of this lesson I can:
  • Divide quantities by using a ratio

Slide 2 - Slide

To make bara brith for 5 people you need 450 g of dried fruit. How many g of dried fruit do you need for 20 people?
A
9000 g
B
22.5 g
C
1800 g
D
45000 g

Slide 3 - Quiz

Proportion 
To make bara brith for 5 people you need 450 g of dried fruit. How many g of dried fruit do you need for 20 people

people : grams = 5 : 450 = 20 : 1800
20 people : 1800 grams 
So you need 1800 grams for 20 people. 

Slide 4 - Slide

Using ratio's to divide quantities
  A mother wants to divide ₹100 (indian rupee)  in the ratio 2 : 3 to give to her children Naya and Amar. 
How much does each child receive? 


Slide 5 - Slide

Using ratio's to divide quantities
  A mother wants to divide ₹100 (indian rupee)  in the ratio 2 : 3 to give to her children Naya and Amar. 
How much does each child receive? 

Answer: 
Naya:  ₹40
Amar :  ₹60 


Slide 6 - Slide

What to do
If you: 
- Got all of them right                Quietly work on the work on ManageBac
- Got 1 mistake                              Join the explanation of this problem
- Got more than 1 mistake       Join the explanation of this problem and do                                                                       another together

Slide 7 - Slide

Using ratio's to divide quantities
  A mother wants to divide ₹100 (indian rupee)  in the ratio 2 : 3 to give to her children Naya and Amar. 
How much does each child receive? 

- How many parts does the ratio contain in total? 
- Can you convert the ratio to fractions
- Check if your answers add up to ₹100.

Slide 8 - Slide

Using ratio's to divide quantities
  A mother wants to divide ₹100 (indian rupee)  in the ratio 2 : 3 to give to her children Naya and Amar. 
How much does each child receive? 

The ratio 2 : 5 contains _____________________ parts in total
Naya receives               of the money and Amar receives                  of the money 
of  ₹100   =                                                       of  ₹100 =     
Check : 

Slide 9 - Slide

Using ratio's to divide quantities
A bag contains 24 sweets. Three friends share the sweets in the ratio of 1:2:3. How many sweets does each person get?
Step 1: Find the total amount of parts.

Step 1: 1 + 2 + 3 = 6 parts

Slide 10 - Slide

Using ratio's to divide quantities
A bag contains 24 sweets. Three friends share the sweets in the ratio of 1:2:3. How many sweets does each person get?
Step 1: Find the total amount of parts.
Step 2: Convert the ratio into fractions.

Step 1: 1 + 2 + 3 = 6 parts
Step 2: 

Slide 11 - Slide

Using ratio's to divide quantities
A bag contains 24 sweets. Three friends share the sweets in the ratio of 1:2:3. How many sweets does each person get?
Step 1: Find the total amount of parts.
Step 2: Convert the ratio into fractions.
Step 3: Find the portions by multiplying the fractions with the quantity.

Step 1: 1 + 2 + 3 = 6 parts
Step 2: 

Step 3: 

        of 24 =               of 24 =              of 24 = 

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Slide 12 - Slide

Using ratio's to divide quantities
A bag contains 24 sweets. Three friends share the sweets in the ratio of 1:2:3. How many sweets does each person get?
Step 1: Find the total amount of parts.
Step 2: Convert the ratio into fractions.
Step 3: Find the portions by multiplying the fractions with the quantity.
Step 4: Check if the portions add up to the original quantity. 
Step 1: 1 + 2 + 3 = 6 parts
Step 2: 

Step 3: 

        of 24 =  4           of 24 =  6          of 24 = 12

Step 4:  
61
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63

Slide 13 - Slide

Using ratio's to divide quantities
A bag contains 24 sweets. Three friends share the sweets in the ratio of 1:2:3. How many sweets does each person get?
Step 1: Find the total amount of parts.
Step 2: Convert the ratio into fractions.
Step 3: Find the portions by multiplying the fractions with the quantity.
Step 4: Check if the portions add up to the original quantity. 
Step 1: 1 + 2 + 3 = 6 parts
Step 2: 

Step 3: 

        of 24 =  4           of 24 =  6          of 24 = 12

Step 4:  4 + 8 + 12 = 2 
61
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63
61
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63

Slide 14 - Slide

Let's get to work! 
p. 317 : 16F              1, 2, 3, 4, 5, 6

Done? 
"Ratios Challenging word problems"
on ManageBac

                                  




Slide 15 - Slide

Homework(learning)
MyiMaths : 
- Ratio dividing 1
- Ratio dividing 2

Slide 16 - Slide