Summary
A focused lesson on rounding whole numbers to the nearest 10 and 100. Daniel uses number lines and the "look at the neighbor" rule. Covers why we round and when it's useful in real-life estimation.
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Teaching resources
Discussion questions
Discussion
Rounding gives us a close estimate that is easier to work with.
- Why would we round a number instead of using the exact number?
- Is 45 closer to 40 or 50? How do you decide?
- Give an example of a time in daily life when you would round a number.
Quick work-a-long
Vocabulary: round, nearest ten, nearest hundred, estimate, number line.
Try it: Round each to the nearest 10: 37, 82, 155. Check on a number line.