Lesson 7

At the Circus: Compare

Est. Class Sessions: 1
X

Mathematical Standards

1.OA.A
Represent and solve problems involving addition and subtraction. (1.OA.A.1)
1.OA.B
Understand and apply properties of operations and the relationship between addition and subtraction. (1.OA.B.3)
1.OA.C
Add and subtract within 20. (1.OA.C.6)
1.OA.D
Work with addition and subtraction equations. (1.OA.D.8)

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.
MP8.
Look for and express regularity in repeated reasoning.

This lesson continues the work in Lesson 3, using addition strategies to solve comparison problems. Students make connections between addition and subtraction as inverse operations. They explore subtraction situations that involve comparing two sets of objects, determining which is more, and finding how much more.

Content in this Lesson

  • Representing addition and subtraction using stories, drawings, diagrams, counters, number sentences, number lines, or ten frames [E2].
  • Finding the related subtraction sentence for an addition sentence [E3].
  • Using strategies that apply the properties of addition (e.g., turn-around, zero) to solve addition and subtraction problems [E4].
  • Finding the unknown whole number in an addition or subtraction equation relating to three whole numbers [E5].
  • Adding and subtracting within 10 using invented, counting (e.g., counting on, counting up), and reasoning (e.g., making ten, using ten, using doubles) strategies [E7].
  • Solving word problems (e.g., join, compare) involving two whole numbers whose answer is less than or equal to 10 [E6].
  • Knowing what is important to solve a problem [MPE1].
  • Finding addition and subtraction strategies to solve problems [MPE2].

Daily Practice and Problems W–X

W. Pennies and Nickels

X. Counting On

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

connecting cubes
desk number line (0–40)
paper

Materials for the Teacher

Display of At the Circus page (Student Activity Book) Page 129 or (Adventure Book)
Display of first How Many More page (Student Activity Book ) Page 151
Display of Ten Frames (Student Activity Book) Reference
Unit 6 Assessment Record
Math Facts Class Record
How Many More at the Circus chart from Lesson 3
connecting cubes
chart paper

Materials Preparation

Prepare to Display a Comparison Problem. Write the following problem on a chart: Jacob wants to buy a book of puzzles that costs $9. He has earned $4 helping his aunt. How much more money does he need to buy the book?

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed
How Many More
Check-In: Questions 2–6
with Feedback Box
Student Activity Book
Pages 152–154
E2.
Represent addition and subtraction using stories, drawings, diagrams, counters, number sentences, number lines, or ten frames.
E3.
Find the related subtraction sentence for an addition sentence (e.g., fact families).
E4.
Use strategies that apply the properties of addition (e.g., turn-around, zero) to solve addition and subtraction problems.
Find the related subtraction sentence for an addition sentence (e.g., fact families).
E5.
Find the unknown whole number in an addition or subtraction equation relating three whole numbers.
E6.
Solve word problems (e.g., join, separate/take away, part-whole, compare) involving two whole numbers whose answer is less than or equal to 10.
E7.
Add and subtract within 10 using invented, counting (e.g., counting on, counting up, counting back), and reasoning (e.g., making ten, using ten, using doubles) strategies.
MPE1.
Know the problem. I read the problem carefully. I know the questions to answer and what information is important.
MPE2.
Find a strategy. I read the problem carefully. I know the questions to answer and what information is important.
DPP Item X
Counting On
Teacher Guide - digital
E8.
Use mental math strategies to add (e.g. direct modeling, counting strategies, reasoning from known facts) for the facts in Groups A and B.

Vocabulary in this Lesson