TEKS 3.4G: Multiplication Strategies
Multiplication of 1 and 2 Digit Numbers
About this lesson
Learning Target: I can solve two-digit by one-digit multiplication problems using an area model, partial product, and the standard algorithm.
Focuses On:
- Reinforcing multiplication vocabulary such as product and vocabulary associated with the algorithm such as tens place and ones place
- Using area models, he partial product method and the standard algorithm to understand and solve 2-digit by 1-digit multiplication problems
- Giving students the choice of solving using the strategy that works best for them
Builds On:
2.6A:
Model, create, and describe contextual multiplication situations in which equivalent sets of concrete objects are joined.
Next Level:
4.4H:
Solve with fluency one‐ and two‐step problems involving multiplication and division, including interpreting remainders.
Read More:
This lesson is designed to support student understanding of the different strategies that may be used to solve a two-digit by one-digit multiplication problem.
The first instructional block focuses on using area models to break apart a two-digit number into tens and ones in order to multiply another number.
The second instructional block introduces the partial product method by referencing the area model method but focusing on breaking down the numbers without the pictorial representation of the area model.
The third instructional block focuses on the standard algorithm and outlining the set of instructions needed to solve two-digit by one-digit multiplication problems.
Scaffolds and supports such as pictorial representations and models are intentionally built throughout to support student understanding.
Grade 3MathTEKS 3.4GUsing Multiplication Properties
About this lesson
Learning Target: I can use multiplication properties to multiply a two-digit number by a one-digit number.
Focuses On:
- Reinforcing the definition of the three properties of multiplication: associate, commutative, and distributive
- Using each of the three properties individually to solve two-digit by one-digit multiplication equations in a variety of ways
Builds On:
2.6A:
Model, create, and describe contextual multiplication situations in which equivalent sets of concrete objects are joined.
Next Level:
4.4H:
Solve with fluency one‐ and two‐step problems involving multiplication and division, including interpreting remainders.
Read More:
This lesson is designed to support student understanding of the different multiplication properties that may be used to solve a two-digit by one-digit multiplication problem. The lesson introduces introduces the properties of multiplication: associative, commutative, and distributive. It provides students with various opportunities to use those strategies to solve 2-digit by 1-digit multiplication problems.
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In the first instructional block, students are introduced to the commutative property and practice switching the order of the numbers as a strategy to do more efficient mental math.
The second instructional block focuses on the associative property and students practice simplifying expressions in different ways to make a multiplication problem easier to solve.
In the third instructional block, the distributive property is introduced. Students practice breaking apart one factor and multiply in smaller parts.
Scaffolds and supports are intentionally built throughout the lesson to support conceptual learning.
Grade 3MathTEKS 3.4G