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Cube Week 9

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WALT: find the length and width of everyday objects

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Measurement using mm, cm and m

  1. How many millimetres are there 3 centimetres? ______________
  2. How many millimetres are there in 5 centimetres? _____________
  3. How many millimetres are there in 8 centimetres? _____________
  4. How many mm are there in 4 and a half cm? _________________
  5. How many cm are there in 60 mm? _____________________
  6. How many cm are there in 50 mm? ___________________
  7. How many cm are there in 1 metre? __________________
  8. How many cm are there in half a metre? ___________________
  9. How many cm are there in 2 metres? ______________________
  10. How many metres are there in 1 kilometre? __________________

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Finding the length and width

of an object:

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Measurement tasks:

  1. Use your ruler to find out the length and width of your desk

Length in cm: Width in cm:

  • Use your ruler to find out the length and width of your chromebook

Length in cm: Width in cm:

  • Use your ruler to find out the length of your arm

Length in cm:

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Measurement tasks:

  • Use your ruler to find out the length and width of an iMac screen

Length in cm: Width in cm:

  • Use your ruler to find out the length and width of the whiteboard

Length in cm: Width in cm:

  • Use your ruler to find out the length of your leg

Length in cm:

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Making an estimate

When you make an estimate in maths, you are making a rough calculation about how tall, long or heavy something is. Watch the following video to find out more:

Khan Academy - estimating lengths

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Making an estimate

  1. How long is our classroom? Pretend that the length of your shoe is 25cm. Put one foot in front of the other and walk along the length of the room to make a guess about how long the length of the room is.

Answer:

  • How wide is our classroom? Pretend that the length of your shoe is 25cm. Put one foot in front of the other and walk along the width of room to make a guess about how wide the room is.

Answer:

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Making an estimate

  • Estimate how high the ceiling is in the shortest part of our classroom in metres

Answer:

  • Estimate how high the ceiling is in the highest part of our classroom in metres

Answer:

  • Estimate the length of the basketball court outside in metres

Answer:

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Measurement:

  1. Which is a better estimate for the length of a whale?

Metres or kilometres? (highlight the correct answer)

  • Which is a better estimate for the weight of a child?

Tons or kilos? (highlight the correct answer)

  • Which is a better estimate for the volume of a can of spaghetti?

1 litre or 250 millilitres? (highlight the correct answer)