Grade 3/Addition
Whole Hundreds (3 Addends) (756)
Three-addend practice with whole hundreds.
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Teacher Resources
Teaching Notes
Have students circle 100s first, then finish mentally.
Common Mistakes
- Ignoring place value
- Incorrectly summing groups
- Forgetting trailing zeros
- Mental arithmetic errors
Differentiation
SupportUse base ten blocks to visualize hundreds.
ChallengeAdd four or more whole hundreds mentally.
Discussion Questions
- How does grouping hundreds help?
- When is this strategy most useful?
- Why do we add the zeros last?
- Can you find other patterns?
Learning Path
Skill Cluster
Mental Math Strategies
Estimated Time
10 minutes
Skills Practiced
group hundreds 3 addends
Prerequisites
- add_whole_hundreds
- Adding multiples of 10
- Place value to hundreds
- Adding three 1-digit numbers
Next Steps
- Adding 3-digit numbers mentally
- Estimating sums of hundreds
- Adding whole thousands
- Whole Hundreds (2 Addends) - Set A
- Whole Tens (3 Addends) - Set A
- Adding 3-Digit Numbers (No Regrouping)