The Power of Place Value and Large Numbers · Number Sense
Estimation and Rounding Strategies
Moving beyond rules to understand when an estimate is more practical than an exact count.
Key Questions
- 1When is an estimate more useful than an exact answer in real life?
- 2How does the context of a problem change which place value we should round to?
- 3In what ways can a number line help us justify our rounding decisions?
Ontario Curriculum Expectations
ON: Number - Grade 4
Grade: Grade 4
Subject: Mathematics
Unit: The Power of Place Value and Large Numbers
Period: Number Sense
Suggested Methodologies
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