Lesson 2

Lesson 2
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Slide 1: Diapositive
MathematicsLower Secondary (Key Stage 3)

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Lesson 2

Slide 1 - Diapositive

Describe what a bar model is and how it can be used to show ratios.

Slide 2 - Question ouverte

Select the correct bar model for the ratio blue : brown = 3 : 4
A
B
C
D

Slide 3 - Quiz

Simplify the ratio in the bar model below in terms of blue to brown:
A
4 : 8
B
8 : 4
C
1 : 2
D
2 : 1

Slide 4 - Quiz

Select the equivalent bar model for the ratio blue : brown = 1 : 1
A
B
C
D

Slide 5 - Quiz

Select the correct fraction for the bar model below in the form blue/brown:

A
3/8
B
3/5
C
5/8
D
8/5

Slide 6 - Quiz

Select the correct fraction for the bar model below in the form brown/whole:

A
3/8
B
8/3
C
8/5
D
5/8

Slide 7 - Quiz

Slide 8 - Diapositive

Slide 9 - Diapositive

Match the correct ratio to the bar model.  (NOTE: each ratio is blue:brown)
1 : 1
4 : 3
3 : 5
3 : 4

Slide 10 - Question de remorquage

Starter
Calculate the following expressions:

          
   3 + 4 x 5
   3 x 4 + 5
   3 x (4 + 5)
 3 x 4 + 4 x 5
   18 ÷ 2 + 6
   18 ÷ 6 - 2
   18 ÷ (3 + 6)
  18 ÷ 3  + 13

Slide 11 - Diapositive

Slide 12 - Diapositive

3/8 of the purple paint is made up of red paint.

Slide 13 - Diapositive

Slide 14 - Diapositive

5/8 of the purple paint is made up of blue paint.

Slide 15 - Diapositive

Slide 16 - Diapositive

The amount of red paint used is 3/5 of the amount of blue paint used .

Slide 17 - Diapositive

Slide 18 - Diapositive

The amount of blue paint used is 5/3 of the amount of red paint used .

Slide 19 - Diapositive

Slide 20 - Diapositive

Slide 21 - Diapositive

Slide 22 - Diapositive


A
2/7
B
2/9
C
7/9
D
7/2

Slide 23 - Quiz

Slide 24 - Diapositive


A
2/7
B
2/9
C
7/9
D
7/2

Slide 25 - Quiz

Slide 26 - Diapositive


A
2/7
B
2/9
C
7/9
D
7/2

Slide 27 - Quiz

Slide 28 - Diapositive

Slide 29 - Diapositive

?

Slide 30 - Diapositive

2/5

Slide 31 - Diapositive

?

Slide 32 - Diapositive

3/5

Slide 33 - Diapositive

3/5

Slide 34 - Diapositive

Slide 35 - Diapositive

Slide 36 - Diapositive

Slide 37 - Diapositive

Slide 38 - Diapositive

Slide 39 - Diapositive