Lesson 10

Multiplication Strategies

Est. Class Sessions: 1
X

Mathematical Standards

4.NBT.A
Generalize place value understanding for multi-digit whole numbers. (4.NBT.A.2)
4.NBT.B
Use place value understanding and properties of operations to perform multi-digit arithmetic. (4.NBT.B.5)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP6.
Attend to precision.

Students construct a multiplication strategies menu based on strategies and methods discussed in Lessons 8 and 9. Students then solve multiplication problems using the menu. This lesson is an opportunity to revisit concepts covered earlier in the unit and provides opportunities for practice.

Content in this Lesson

  • Multiplying 2-digit numbers by 1-digit numbers using paper-and-pencil methods (expanded form, all-partials, compact) [E8].
  • Choosing appropriately from among mental math and paper-and-pencil methods to multiply whole numbers [E10].
  • Solving multiplication problems using mental math strategies [E5].

Daily Practice and Problems II–JJ

II. How Much More?

JJ. Who Am I?

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Materials for the Teacher

Chart paper displays made in Lessons 8 and 9. See Materials Preparation.
Display of the Multiplication Strategies Menu (Student Activity Book) Page 137 or (Student Guide) Reference
Unit 4 Assessment Record
Unit 4 Individual Assessment Record
chart paper and markers

Materials Preparation

Multiplication Table. Students should have their multiplication tables available. Students may use the Small Multiplication Tables distributed in Unit 3 Lesson 1 (also available as a Master in this unit) or their Multiplication Facts I Know charts from Unit 3 Lesson 2.

Strategy Charts. In Lesson 8 and 9 students prepared a collection of charts that named and displayed a variety of mental math and paper-and-pencil methods to multiply. Students will use the strategies displayed on these charts to build a multiplication strategies menu in this lesson.

Assessment in this Lesson

Assessment Expectation Assessed
Practicing Multiplication Strategies
Student Activity Book
Pages 139–140
E5.
Solve multiplication problems using mental math strategies (e.g., composing and decomposing numbers and doubling and halving).
E8.
Multiply 2-digit numbers by 1-digit numbers using paper-and-pencil methods (expanded form, all-partials, and compact).
E10.
Choose appropriately between mental math and paper-and-pencil methods to multiply whole numbers.