Lesson 2

Multiplication Strategies

Est. Class Sessions: 2–3
X

Mathematical Standards

5.NBT.B
Perform operations with multidigit whole numbers and with decimals to hundredths. (5.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.
MP4.
Model with mathematics.
MP5.
Use appropriate tools.
MP6.
Attend to precision.

Students review paper-and-pencil methods and mental math strategies for multiplication of multidigit numbers. They solve problems, choosing whether to multiply using metal math or paper-and-pencil methods.

Content in this Lesson

  • Solving multiplication problems using invented strategies, mental math, and expanded form.
  • Multiplying multidigit numbers using mental math and paper-and-pencil methods (expanded form, rectangle model, all-partials, compact) [E4].
  • Choosing appropriately from among mental math, estimation, and paper-and-pencil methods to find sums, differences, and products [E6].
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide

Teacher Resources

 Teacher Guide - digital  

Supplies for Students

  • self-adhesive notes

Materials for the Teacher

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed

Multiplication Strategies
Check-In: Questions 17–19
Student Guide
Page 170
with corresponding Feedback Box
Teacher Guide - digital
E4.
Multiply multidigit numbers using mental math and paper-and-pencil methods (expanded form, rectangle model, all-partials, compact).
E6.
Choose appropriately from among mental math, estimation, and paper-and-pencil methods to find sums, differences, and products.
MPE2.
Find a strategy. I choose good tools and an efficient strategy for solving the problem.
MPE4.
Check my calculations. If I make mistakes, I correct them.