Lesson 4

• Mathematics
• Lower Secondary (Key Stage 3)

Lesson 4

Starter

Calculate the following expressions

 

          

(3 x 8) ÷ 10 

(8 x 3) ÷ 5

(6 x 15) ÷ 30

180 ÷ (6 x 15)

(4 x 6) ÷ 3

(9 x 10) ÷ (6 x 5)

(3 x 20)÷(2 x 15)

(14 x 3) ÷ 6

Starter

Calculate the following expressions

 

          

   (3 x 8) ÷ 10   

(8 x 3) ÷ 5

 (6 x 15) ÷ 30

180 ÷ (6 x 15)

2.4

4.8

3

2

(4 x 6) ÷ 3

(9 x 10) ÷ (6 x 5)

(3 x 20)÷(2 x 15)

(14 x 3) ÷ 6

Starter

Calculate the following expressions

 

          

(3 x 8) ÷ 10 

(8 x 3) ÷ 5

(6 x 15) ÷ 30

180 ÷ (64 x 15)

2.4

4.8

3

2

(4 x 6) ÷ 3

8

(9 x 10) ÷ (6 x 5)

(3 x 20)÷(2 x 15)

2

(14 x 3) ÷ 6

7

3

How would you describe a rectangle?

Select the correct property from the options below for a rectangle.

1. All the sides are equal in length
2. All the sides are parallel
3. Opposite sides are equal in length
4. The perimeter is the sum of the two different lengths

Select the incorrect property from the options below for a rectangle.

1. All the internal angles are ninety degrees
2. Opposite sides are parallel
3. Opposite sides are equal in length
4. The sum of the internal angles is one hundred and eighty degrees

If a rectangle has an area of 12 square units, select the correct list of possible length and height

Find all of the factors of 20

1. 1, 2, 4, 5, 20
2. 2, 4, 5, 10
3. 1, 2, 4, 5, 10, 20
4. 1, 2, 10, 20

Identify the correct calculation to give a product of 20

1. 4 x 10
2. 20 ÷ 5
3. 5 x 4
4. 5 ÷ 4

Current perimeter = ?

Current perimeter = 8 + 6 + 8 + 6 = 28m

Current perimeter = 8 + 6 + 8 + 6 = 28m

Double means ...?

Current perimeter = 8 + 6 + 8 + 6 = 28m

Double means x by 2

Current perimeter = 8 + 6 + 8 + 6 = 28m

Double means x by 2

New perimeter = 16 + 12 + 16 + 12 = 56m

Current perimeter = 8 + 6 + 8 + 6 = 28m

Double means x by 2

New perimeter = 16 + 12 + 16 + 12 = 56m

56 is double 28 and so the new dimensions  are?

Current perimeter = 8 + 6 + 8 + 6 = 28m

Double means x by 2

New perimeter = 16 + 12 + 16 + 12 = 56m

56 is double 28 and so the new dimensions  are length 16 and height 12

Current area = 8 x 6 = 48 square metres

Double means x by 2

New area = 8 x 2 x 6

                   = (8 x 2) x 6 OR 8 x (2 x 6)

 

The new dimensions are either l = 16 and h = 6 OR

l = 8 and h = 12

Current area = 8 x 6 = ?

Current area = 8 x 6 = 48 square metres

Current area = 8 x 6 = 48 square metres

Double means x by 2

New area = 8 x 2 x 6

                   

Current area = 8 x 6 = 48 square metres

Double means x by 2

New area = 8 x 2 x 6

                   = (8 x 2) x 6 OR 8 x (2 x 6)

 

Current area = 8 x 6 = 48 square metres

Double means x by 2

New area = 8 x 2 x 6

                   = (8 x 2) x 6 OR 8 x (2 x 6)

 

The new dimensions are either l = 16 and h = 6 OR

l = 8 and h = 12

1. rectangle X has the greater area
2. rectangle Y has the greater area
3. rectangle X has the greater perimeter
4. rectangle Y has the greater perimeter

1. rectangle P has the greater area
2. rectangle Q has the greater area
3. rectangle P has the greater perimeter
4. rectangle Q has the greater perimeter

1. rectangle R has the greater area
2. rectangle S has the greater area
3. rectangle R has the greater perimeter
4. rectangle S has the greater perimeter