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We can not know who invented the decimal system, because it is very old, but it is usually accepted that it was the Persian mathematician Al-Khwarizmi (born in 780) who perfected the decimal system of the Hindus and who contributed to its spread out of India.

APPROXIMATION

Key questions

  1. How do we round a number?

  2. How can we estimate the answer to a calculation?

  3. What is an upper and lower bound?

  4. Can we find an error interval?

  5. Can we problem solve with approximations?

4 lessons

Specification details

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Literacy

  • stories that set a frame or background

  • stories that accompany or intertwine

  • stories that introduce

  • stories that explain

  • stories that ask a question

  • stories that entertain

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