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### Course: 5th grade (Eureka Math/EngageNY) > Unit 2

Lesson 1: Topic A: Mental strategies for multi-digit whole number multiplication- Multiply and divide whole numbers by 10, 100, and 1000
- Multiplying by multiples of 10
- Multiply 1-digit numbers by a multiple of 10, 100, and 1000
- Multiplying 10s
- Strategies for multiplying multiples of 10, 100 and 1000
- Multiply by taking out factors of 10
- Estimating multi-digit multiplication
- Estimate multi-digit multiplication

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# Estimate multi-digit multiplication

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