The Power of Place Value · Number Sense
Estimation and Benchmarking
Using known quantities as benchmarks to estimate the size of unknown sets and measurements.
Key Questions
- 1When is an estimate more useful than an exact count in everyday life?
- 2How do benchmarks like 50 or 100 help us make more accurate predictions?
- 3How can we justify if an estimate is reasonable or not?
Ontario Curriculum Expectations
ON: Number - Grade 3
Grade: Grade 3
Subject: Mathematics
Unit: The Power of Place Value
Period: Number Sense
Suggested Methodologies
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