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# Unit 1: Module 1: Properties of multiplication and division and solving problems with units of 2–5 and 10

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## About this unit

"This module begins the year by building on students’ fluency with addition and their knowledge of arrays. In Topic A, students initially use repeated addition to find the total from a number of equal groups (2.OA.4). As students notice patterns, they let go of longer addition sentences in favor of more efficient multiplication facts (3.OA.1). Lessons in Topic A move students’ Grade 2 work with arrays and repeated addition a step further by developing skip-counting rows as a strategy for multiplication. Arrays become a cornerstone of the module. Students use the language of multiplication as they understand what factors are and differentiate between the size of groups and the number of groups within a given context. In this module, the factors 2 , 3 , 4 , 5 , and 10 provide an entry point for moving into more difficult factors in later modules." Eureka Math/EngageNY (c) 2015 GreatMinds.org### Learn

### Practice

- Equal groupsGet 3 of 4 questions to level up!
- Understand equal groups as multiplicationGet 5 of 7 questions to level up!
- Relate repeated addition to multiplicationGet 5 of 7 questions to level up!
- Understand multiplication using groups of objectsGet 5 of 7 questions to level up!
- Multiply using groups of objectsGet 5 of 7 questions to level up!
- Understand multiplication with arraysGet 5 of 7 questions to level up!
- Multiply with arraysGet 5 of 7 questions to level up!

### Learn

### Practice

- Division with groups of objectsGet 5 of 7 questions to level up!
- Division with arraysGet 5 of 7 questions to level up!
- Divide with visualsGet 5 of 7 questions to level up!
- Division in contextsGet 5 of 7 questions to level up!

Level up on the above skills and collect up to 880 Mastery points

### Learn

### Practice

- Represent the commutative property of multiplicationGet 3 of 4 questions to level up!
- Understand the commutative property of multiplicationGet 3 of 4 questions to level up!
- Commutative property of multiplicationGet 5 of 7 questions to level up!
- Multiply by 2Get 5 of 7 questions to level up!
- Multiply by 3Get 5 of 7 questions to level up!

### Learn

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### Practice

- Divide with visualsGet 5 of 7 questions to level up!
- Divide by 2Get 7 of 10 questions to level up!
- Divide by 3Get 7 of 10 questions to level up!

Level up on the above skills and collect up to 640 Mastery points

### Learn

### Practice

- Multiply by 2 and 4Get 10 of 14 questions to level up!
- Multiply by 4Get 5 of 7 questions to level up!
- Divide by 4Get 7 of 10 questions to level up!
- Relate division to multiplicationGet 5 of 7 questions to level up!
- Multiplication in contextsGet 5 of 7 questions to level up!
- Relate division to multiplication word problemsGet 3 of 4 questions to level up!

### Learn

### Practice

- Visualize distributive propertyGet 3 of 4 questions to level up!
- Distributive propertyGet 3 of 4 questions to level up!
- 2-step word problemsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 720 Mastery points

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