The Power of Place: Large Numbers and Decimals · Number Sense

Decimals in the Real World

Applying decimal understanding to measurement and currency to solve practical problems.

Key Questions

  1. 1In what situations is an estimate more useful than an exact decimal calculation?
  2. 2How does the precision of a decimal change our interpretation of a measurement?
  3. 3Why do we round decimals in different ways depending on the context of the problem?

Ontario Curriculum Expectations

ON: Number - Grade 5
Grade: Grade 5
Subject: Mathematics
Unit: The Power of Place: Large Numbers and Decimals
Period: Number Sense

Suggested Methodologies

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The Infinite Scale of Base Ten

Investigating how the value of a digit changes by a factor of ten as it moves between places.

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