Lesson 1

Workshop: Addition and Subtraction Strategies

Est. Class Sessions: 2–3
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Mathematical Standards

5.NBT.B
Perform operations with multidigit whole numbers and with decimals to hundredths. (5.NBT.B.5, 5.NBT.B.6)

Standards for Mathematical Practice

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

In this workshop, students play the Digits Game and complete problem sets to extend their understanding and flexibility with strategies for solving addition and subtraction problems and to practice the computation skills involved. Students solve a variety of problems including problems that ask them to estimate rather than calculate an exact answer.

Content in this Lesson

  • Demonstrating understanding of the place value concepts and mathematical properties involved in operations with multidigit numbers (e.g., making trades in subtraction) [E1].
  • Adding and subtracting multidigit numbers using more than one strategy [E3].
  • Estimating sums and differences [E5].
  • Choosing appropriately from among mental math, estimation, and paper-and-pencil methods to find sums and differences [E6].
  • Solving multistep addition and subtraction problems [E7].
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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
  • DPP Item A
    Multiplication and Division Facts: 9s

Supplies for Students

  • self-adhesive notes

Materials for the Teacher

Materials Preparation

Prepare Cards for Digits Game. Make a set of Digit Cards 0–9 using index cards, a deck of cards, or the Digit Cards 0–9 Masters. If using playing cards, the ace can stand for 1 and a face or joker card can stand for zero.

Triangle Flash Cards. Prepare copies of the Triangle Flash Cards: 9s on heavier paper or card stock. Have students cut apart each set and store them in an envelope. You may want to provide each student with two sets, one to use at school and one to take home.

Assessment in this Lesson

Assessment Expectation Assessed
Use Addition and Subtraction Strategies
Self-Check: Questions 1–4
Student Activity Book
Pages 151–153
E1.
Demonstrate understanding of the place value concepts and mathematical properties involved in operations with multidigit numbers (e.g., making trades in addition and subtraction, using the distributive property to multiply).
E3.
Add and subtract multidigit numbers using more than one strategy.
E5.
Estimate sums, differences, and products.
Use Addition and Subtraction Strategies
Check-In: Question 13
Student Activity Book
Page 158
E1.
Demonstrate understanding of the place value concepts and mathematical properties involved in operations with multidigit numbers (e.g., making trades in addition and subtraction, using the distributive property to multiply).
E3.
Add and subtract multidigit numbers using more than one strategy.
Workshop: Addition and Subtraction Strategies
Self-Check: Questions 1–4
Student Guide
Page 162
E6.
Choose appropriately from among mental math, estimation, and paper-and-pencil methods to find sums, differences, and products.
E7.
Solve multistep problems using addition, subtraction, multiplication, and division.
DPP Item A
Multiplication and Division Facts: 9s
Teacher Guide - digital
E10.
Demonstrate fluency with multiplication and division facts for the nines.