Lesson 5

Subtraction

Est. Class Sessions: 2–3
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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.4)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP4.
Model with mathematics.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.

Students improve their understanding of subtraction concepts and their subtraction skills so that they can solve problems efficiently and accurately. Students use base-ten pieces to review paper-and-pencil procedures and develop mental math strategies to subtract. These skills allow students to choose flexibly between using paper and pencil or mental math based on the numbers in the problems and their real-world contexts.

Content in this Lesson

  • Representing and solving subtraction problems using base-ten pieces and number lines [E3].
  • Subtracting multidigit numbers using paper-and-pencil methods (expanded form and compact) [E7].
  • Checking subtraction with addition [E7].
  • Choosing from among mental math and paper-and-pencil methods to subtract whole numbers [E9].
  • Using mental math strategies to solve addition and subtraction problems [E4].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students or Student Pairs

Set of base-ten pieces: 2 packs, 14 flats, 30 skinnies, 50 bits
storage container (shoe box, large bag)

Materials for the Teacher

Display of Base-Ten Recording Sheet Master (Teacher Guide)
Display of Subtraction Strategies Menu (Student Activity Book) Page 119 or (Student Guide) Reference
Unit 4 Assessment Record
Math Facts Class Record
chart paper
set of base-ten pieces

Materials Preparation

Base-Ten Pieces. Organize sets of base-ten pieces for each student or student pair: 2 packs, 14 flats, 30 skinnies, and 50 bits. Use a shoe box or large bag to store base-ten pieces and to store pieces students are not using.

Assessment in this Lesson

Assessment Expectation Assessed
Subtraction
Questions 2–6
Student Guide
Page 139
E7.
Subtract multidigit numbers using paper-and-pencil methods (expanded form and compact).
Subtraction
Check-In: Questions 14–17
Student Guide
Page 143
and
corresponding Feedback Box
Teacher Guide - digital
E3.
Represent and solve subtraction problems using base-ten pieces and number lines.
E4.
Solve addition and subtraction problems using mental math strategies (e.g., composing and decomposing numbers, counting up, and counting back).
E7
Subtract multidigit numbers using paper-and-pencil methods (expanded form and compact).
E9.
Choose appropriately from among mental math, estimation, and paper-and-pencil methods to add and subtract whole numbers.
DPP Item S
Fact Families Quiz
Teacher Guide - digital
E13.
Determine the unknown number in a multiplication or division sentence relating three whole numbers for the 2s, 3s, and 9s facts.
DPP Item T
Big Hops
Teacher Guide - digital
E1.
Show that different partitions of the same number are equal using base-ten pieces, number lines, and number sentences (e.g., 200 + 30 + 7 = 200 + 20 + 17).
E2.
Represent and solve addition problems using base-ten pieces and number lines.

Vocabulary in this Lesson