Lesson 3

Subtracting with Base-Ten Pieces

Est. Class Sessions: 2
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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.

Students solve subtraction problems with base-ten pieces. The purpose is to help them develop a concrete understanding of the trading involved in subtraction in preparation for their work with a paper-and-pencil algorithm in the next lesson.

Content in this Lesson

  • Using place value concepts to make connections among representations of numbers [E1].
  • Subtracting multidigit numbers using base-ten pieces [E2].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide  

Teacher Resources

 Teacher Guide - digital  

Supplies for Student Pairs

set of base-ten pieces: 2 packs, 14 flats, 30 skinnies, and 50 bits

Materials for the Teacher

Display set of base-ten pieces
Unit 7 Assessment Record
Math Facts Class Record

Materials Preparation

Subtraction Flash Cards. Students received and prepared Subtraction Flash Cards in Units 2–5. If needed, prepare copies on heavier paper or card stock. Have students cut apart the sets they need and store them in an envelope.

Assessment in this Lesson

Assessment Expectation Assessed

Subtracting with Base-Ten Pieces
Check-In: Questions 6–10
Student Guide
Page 160
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.

DPP Item G
Subtraction Facts:
Groups 3 and 4
Teacher Guide - digital
E8.
Use mental math strategies to subtract for the facts in Groups 1–4.

Vocabulary in this Lesson