How well did you do? Did you show calculations ?

1 / 7

How well did you do? Did you show calculations ? - PowerPoint PPT Presentation

Do now: These cuboids are all made from 1 cm cubes. Can you find their volumes and surface areas? State the units in your answers. 1. 2. 3. 5. 6. 4. How well did you do? Did you show calculations ?. 1. 2. 3. V = 3 x 3 x 3 = 27cm 3. V = 1 x 2 x 4 = 8cm 3. V = 2 x 2 x 4 = 16cm 3. 5.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

PowerPoint Slideshow about 'How well did you do? Did you show calculations ?' - pules

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Do now: These cuboids are all made from 1 cm cubes.Can you find their volumes and surface areas?

1

2

3

5

6

4

How well did you do? Did you show calculations ?

1

2

3

V = 3 x 3 x 3 = 27cm3

V = 1 x 2 x 4 = 8cm3

V = 2 x 2 x 4 = 16cm3

5

6

4

V = 4 x 4 x 2 = 32cm3

V = 3 x 3 x 5 = 45cm3

V = 2 x 4 x 4 = 32cm3

How well did you do? Did you show calculations ?

1

2

3

SA = 2 x 8 + 2 x 4 + 2 x 2

= 28cm2

SA = 2 x 4 + 2 x 8 + 2 x 8

= 40cm2

SA = 2 x 9 + 2 x 9 + 2 x 9

= 54cm2

5

6

4

SA = 2 x 9 + 2 x 15 + 2 x 15

= 78cm2

SA = 2 x 8 + 2 x 8 + 2 x 16

= 64cm2

SA = 2 x 16 + 2 x 8 + 2 x 8

= 64cm2

Can you find the missing lengths?

1

2

?

6 cm

3 cm

5 cm

5 cm

?

Extra challenge: Can you find the length, width and height of another cuboid that has a volume of 60cm3 ?

How well did you do? Did you solve these problems correctly, showing your calculations?

1

2

?

6 cm

3 cm

5 cm

5 cm

?

3 x 5 x 4 = 60cm3

6 x 5 x 2 =60cm3

Challenge question 2:These two shapes have the same volume.

Can you find the missing length?

4 cm

8 cm

10 cm

5 cm

?

4 cm

How well did you do? Did you solve the problem correctly, showing your calculations?

4 cm

8 cm

10 cm

5 cm

?

3 cm

8 x 3 x 10 = 240cm3

4 x 5 x 12 =240cm3

How did you work out the answer?