Grade 4/Multiplication
Multiply by Whole Tens and Hundreds (825)
Fluent products with factors that are multiples of ten or hundred, emphasizing place-value shifts.
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Teaching Notes
Emphasize shifting place value, not just adding zeros. Connect understanding to powers of ten for conceptual fluency.
Vocabulary
Place Value: Value of a digit based on its position.
Scale: Change the size of a number.
Common Mistakes
- Dropping a zero
- Misplacing place value
- Ignoring place value context
- Incorrect number of zeros
- Forgetting base fact product
- Misaligning digits in calculations
Differentiation
SupportUse base-ten blocks or visual arrays to model.
ChallengeExtend to multiples of 1000 or decimal multiplication.
Discussion Questions
- Why do digits shift left when multiplying by 10?
- How is 30 x 4 similar to 3 x 4?
- What happens when you multiply by 200 vs 20?
- Can you explain a mental strategy for 60 x 7?
Extension Activities
- Multiply by 20, 30, 40.
- Multiply by 100, 200, 300.
- Real-world price calculations.
Parent Tip
Ask your child to find prices for 10 or 100 of an item.
Learning Path
Skill Cluster
Number Sense & Operations
Estimated Time
12 minutes
Skills Practiced
place value scalingdistributive property
Prerequisites
- 821
- Basic multiplication facts
- Understanding place value
Next Steps
- Multiplying multi-digit numbers
- Estimating products
- Multiply by Whole Tens and Hundreds - Set B
- Multiplying Multi-Digit by Single-Digit
- Mental Math: Multiples of Ten and Hundred