Lesson 2

Big Base-Ten Hoppers

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.1, 4.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.
MP5.
Use appropriate tools strategically.
MP6
Attend to precision.
MP7.
Look for and make use of structure.

Students develop flexibility composing and decomposing large numbers based on place value concepts. They use moves on number lines to represent moves of ones, tens, hundreds, and thousands to develop mental math skills.

Content in this Lesson

  • Showing partitions of numbers using number lines and number sentences (e.g., 1705 = 1000 + 700 + 5) [E1].
  • Recognizing that different partitions of the same number are equal (e.g., 200 + 30 + 7 = 200 + 20 + 17) [E1].
  • Representing addition and subtraction problems using number lines [E2, E3].
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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 Student Groups

set of base-ten pieces; about 20 flats, 20 skinnies, 40 bits

Materials for the Teacher

Display of Question 1 on the Big Base-Ten Hoppers page (Student Guide) Page 116
Unit 4 Assessment Record

Assessment in this Lesson

Assessment Expectation Assessed
Big Base-Ten Hoppers
Check-In: Questions 13–19
Student Guide
Page 122
E2.
Represent and solve addition problems using base-ten pieces and number lines.
E3.
Represent and solve subtraction problems using base-ten pieces and number lines.

Vocabulary in this Lesson