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Published byOliver Fields Modified over 7 years ago

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**Do now: These cuboids are all made from 1 cm cubes**

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 4 5 6

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**How well did you do? Did you show calculations ?**

1 2 3 V = 1 x 2 x 4 = 8cm3 V = 3 x 3 x 3 = 27cm3 V = 2 x 2 x 4 = 16cm3 4 5 6 V = 3 x 3 x 5 = 45cm3 V = 4 x 4 x 2 = 32cm3 V = 2 x 4 x 4 = 32cm3

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**How well did you do? Did you show calculations ?**

1 2 3 SA = 2 x x x 2 = 28cm2 SA = 2 x x x 8 = 40cm2 SA = 2 x x x 9 = 54cm2 4 5 6 SA = 2 x x x 15 = 78cm2 SA = 2 x x x 8 = 64cm2 SA = 2 x x x 16 = 64cm2

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**Challenge question 1: These two shapes each have a volume of 60cm3 **

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 ?

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**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

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**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

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**How did you work out the answer?**

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?

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