Description
Overview
This two-lesson Grade 1 sequence builds from efficient addition and subtraction strategies within 20 to solving story problems with an unknown number. Lesson 1 develops flexible strategy use with drawings, counters, ten frames, number paths, and equations. Lesson 2 applies those strategies to addition and subtraction situations in which the unknown may be the result, a missing part, or the starting amount.
What Students Will Learn
- Add and subtract within 20 using efficient strategies.
- Solve unknown number story problems.
What Is Included
- Teacher Guide
- Student Workbook
- Lesson 1: Efficient Addition and Subtraction Within 20
- Add and Subtract Within 20
- Solve Word Problems
- Complete the Number Table
- Lesson 2: Finding the Unknown in Story Problems
- A. Solve the Story Problems
- B. Complete the Part-Part-Whole Table
- C. Find the Unknown Number
Lesson Overview
- Lesson 1: Efficient Addition and Subtraction Within 20 (45 minutes)
- Lesson 2: Finding the Unknown in Story Problems (45 minutes)
Designed For
1st Grade students studying Operations, Fluency, and Problem Solving in Math.
File Format
One downloadable ZIP containing two printable PDF files. The Teacher Guide contains 23 pages and the Student Workbook contains 4 pages.









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