Grade 4: Chapter 3- Multiply 2-Digit Numbers

Chapter Essential Question:What strategies can you use to multiply 2-digit numbers?

Before
(Grade 3) / Chapter Three Standards
Grade 4 / After
(Grade 5)
Understand properties of multiplication and the relationship between multiplication and division. (3.OA.5)
Solve problems involving the four operations, and identify and explain patterns in arithmetic. (3.OA.8) / Number and Operations in Base Ten 5: Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
  • I can use place value and multiplication properties to multiply by tens.
  • I can estimate products by rounding or by using compatible numbers.
  • I can use area models and partial products to multiply 2-digit numbers.
  • I can use place value and partial products to multiply 2-digit numbers.
  • I can use regrouping to multiply 2-digit numbers.
  • I can choose a method to multiply 2-digit numbers.
/ Perform operations with multi-digit whole numbers and with decimals to hundredths. (5.NBT.5)
Operations and Algebraic Thinking 3: Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
  • I can use the strategy draw a diagram to solve multistep multiplication problems.

Each day the math block will begin with 15 minutes of Daily Math Review and Mental Math. The focus of DMR should be either prerequisite standard skills or previous chapter concepts that were not mastered. The focus of mental math should be based on the current Chapter’s skills and concepts. Adjust the amount of questions in DMR and MM to fit into the 15 minute time block.

Suggested Chapter Pacing

All lessons are paced for one day, unless otherwise indicated. Teachers may adjust to meet students’ needs.

Launching the Chapter / Pre-Assessment / Review Prerequisite Skills
Write It!: TE 143I / Show What You Know Assessment
Identify Tier 2 and Tier 3 Groups for Small Group Instruction.
Day before beginning Lesson 3.1 / Vocabulary Activity
Develop vocabulary for number sense.
TE 143H / Vocabulary Builder
Identify students who will need further vocabulary support for Chapter Three. / Preview Chapter Centers
Introduce chapter games, activities, and literature students will be using during center time. / School – Home Letter
Read together and send home.
I Can Statement / Essential Question / Implementation Notes
Lesson 3.1
Numbers and Operations in Base Ten 5 / I can use place value and multiplication properties to multiply by tens. / What strategies can you use to multiply by tens? /
  • All new center activities will need to be introduced.

Lesson 3.2
Numbers and Operations in Base Ten 5 / I can estimate products by rounding or by using compatible numbers. / What strategies can you use to estimate products? /
  • One new center will need to be introduced.

Lesson 3.3
Numbers and Operations in Base Ten 5 / I can use area models and partial products to multiply 2-digit numbers. / How can you use area models and partial products to multiply 2-digit numbers? /
  • Grid paper and colored pencils
  • Two new center activities will need to be introduced

Lesson 3.4
Numbers and Operations in Base Ten 5 / I can use place value and partial products to multiply 2-digit numbers. / How can you use place value and partial products to multiply 2-digit numbers? /
  • Possible 2 day lesson.
  • Mid-chapter checkpoint is not required
  • One new center activity will need to be introduced.

Lesson 3.5
Numbers and Operations in Base Ten 5 / I can use regrouping to multiply 2-digit numbers. / How can you use regrouping to multiply 2-digit numbers? /
  • This lesson introduces the traditional algorithm, however allow students to continue using previously learned strategies. The traditional algorithm will be taught in 5th grade.
  • Two new center activities will need to be introduced

Lesson 3.6
Numbers and Operations in Base Ten 5 / I can choose a method to multiply 2-digit numbers. / How can you find and record products of two 2-digit numbers? /
  • One new center will need to be introduced

Lesson 3.7
Operations and Algebraic Thinking 3 / I can use the strategy draw a diagram to solve multistep multiplication problems. / How can you use the strategy draw a diagram to solve multistep multiplication problems? /
  • Possible 2 day lesson.

Resources and Centers for Chapter 3
Technology / Hands-On Resources / Centers
Digital Lesson: Engage / Math Journal / Activity: Roomy Dimensions
Fastt Math / MathBoard / Activity: Product Power
Interactive White Board Lesson / Other Hands-On Resources may be needed for Small Group Instruction Activities. / Activity: First One Out
Interactive Student Edition / Literature: Multiplying a Good Deed
iTools: Base-Ten Blocks / Literature: Putting the World on a Page
iTools: Number Charts / Game: Triangle Products
iTools: Number Lines / Game: Multiplication Marathon
Math on the Spot Videos / Game: Triangle Products
Mega Math
Personal Math Trainer
Real World Video
Additional Resources for Chapter 3
Operations in Algebraic Thinking 3 / Number and Operations in Base Ten 5
Use story problems throughout the unit
CGI Story Bank
Multi-step problems w/o multiplication & division story bank
Multi-step story problems with multiplication & division story problem bank

Des Moines Public Schools 2014-2015Math Curriculum Guides Page | 1

Grade 4 – Chapter 3