Lesson 5

Workshop: Subtraction

Est. Class Sessions: 2
X

Mathematical Standards

3.NBT.A
Use place value understanding and properties of operations to perform multi-digit arithmetic. (3.NBT.A.2)

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 strategically.
MP6.
Attend to precision.

This Workshop lesson allows students to choose from several problem sets to continue to develop and practice their strategies for solving multidigit subtraction problems. They build a subtraction strategy menu to compare the different strategies and begin to decide which strategies are more efficient for different types of problems.

Content in this Lesson

  • Using and applying place value concepts to make connections among representations of numbers [E1].
  • Representing and solving subtraction problems using base-ten piece and number lines [E2].
  • Subtracting multidigit numbers using mental math strategies [E3].
  • Subtracting multidigit numbers using paper-and-pencil methods [E4].
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

set of base-ten pieces: 2 packs, 14 flats, 30 skinnies, and 50 bits
clear plastic spinner or a pencil and paper clip
paper

Materials for the Teacher

Display of the Subtraction Strategies Menu (Student Guide) Reference
Unit 7 Assessment Record
Math Facts Class Record
chart paper

Assessment in this Lesson

Assessment Expectation Assessed

Observation
Workshop: Subtraction
Questions 1–6
Student Guide
Pages 164–165
E1.
Apply place value concepts to make connections among representations of numbers to the thousands using base-ten pieces, number lines, expanded form, and standard form.

Strategies to Subtract
Self-Check: Question 1
Student Activity Book
Page 235
E1.
Apply place value concepts to make connections among representations of numbers to the thousands using base-ten pieces, number lines, expanded form, and standard form.
E2.
Represent and solve subtraction problems using base-ten pieces and number lines.

Strategies to Subtract
Self-Check: Questions 10–11
Student Activity Book
Page 239
E1.
Apply place value concepts to make connections among representations of numbers to the thousands using base-ten pieces, number lines, expanded form, and standard form.
E3.
Subtract multidigit numbers using mental math strategies (composing and decomposing numbers and counting up).

Strategies to Subtract
Self-Check: Question 16
Student Activity Book
Page 243
E1.
Apply place value concepts to make connections among representations of numbers to the thousands using base-ten pieces, number lines, expanded form, and standard form.
E4.
Subtract multidigit numbers using paper-and-pencil methods (e.g., expanded form and compact).

Subtraction Quiz with
Feedback Box
Teacher Guide - digital
E1.
Apply place value concepts to make connections among representations of numbers to the thousands using base-ten pieces, number lines, expanded form, and standard form.
E3.
Subtract multidigit numbers using mental math strategies (composing and decomposing numbers and counting up).
E4.
Subtract multidigit numbers using paper-and-pencil methods (e.g., expanded form and compact).

DPP Item O
Time to Go
Teacher Guide - digital
E6.
Solve problems involving time measurements to the nearest minute.
E7.
Write and tell time to the nearest minute.

DPP Item P
Fact Families: Groups 1–4
Teacher Guide - digital
E9.
Determine the unknown number in an addition or subtraction sentence relating three whole numbers for the facts in Groups 1–4.

Vocabulary in this Lesson