91热爆

Video summary

Olivia and Hassan are taught how to round to the nearest 1000, 10,000, and 100,000 when a disgruntled magic carpet demands money from them.

Our great mathemagician Hypatia adds further rounding problems for the duo to complete before they can continue through the mathemagical maze, challenging them to round to the nearest 1,000, 10,000, and 100,000.

The episode ends with a final rounding question for pupils to answer in the classroom.

This short animated film is from the 91热爆 Teach series, Hypatia's Mathematical Maze.

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Teacher Notes

Before watching the film:

Prior to this lesson you may wish to introduce students to other relevant topics, for example:

  • Place value appropriate to the year group
  • Estimation of placing numbers along a number line
  • Finding multiples of 10, 100 and 1000 above and below a number

During the film:

Depending on your lesson鈥檚 focus, you may wish to pause the video at certain points to check for understanding, asking questions such as:

  • Do you understand what is meant by the nearest 10 / 100 / 1000?
  • Do you know which digits round up, and which round down?
  • Why does rounding make things easier to understand?
  • Can you tackle Hypatia鈥檚 final question?

Final question:Fill in the gap so each number rounds to 120,000 when rounded to the nearest 10,000:11?,6231?1,92812?,054

Answer to the final question:Gap 1: 5,6,7,8 or 9Gap 2: 2Gap 3: 0,1,2,3 or 4

Following on from the film:

  • Practise procedural variation by giving pupils numbers with the same digit ending to round and asking them what they notice, e.g. 27, 427, 727, 1827 rounded to the nearest 10.
  • Round the same number to the nearest 10, 100 and 1000 to show what changes in the method when the digit we are rounding to changes.
  • Give digit cards and set a problem in the inverse, e.g. I make a number using the cards 2, 8, 8, 2. It rounds to 8200 to the nearest 100. What number did I make?

This short film is suitable for teaching maths at KS2 in England, Wales and Northern Ireland and 2nd Level in Scotland.

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