Lesson 6

Leonardo the Traveler

Est. Class Sessions: 1
X

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

MP2.
Reason quantitatively.
MP4.
Model with mathematics.
MP6.
Attend to precision.

Students review addition and subtraction strategies and partitioning numbers while learning about other representations of numbers (e.g., the abacus, Roman Numerals) through the story Leonardo the Traveler. This story is based on the life and discoveries of the famous Italian mathematician, Leonardo Fibonacci.

Content in this Lesson

  • Understanding the historical and multicultural roots of the Hindu-Arabic number system.
  • Reviewing strategies for multidigit addition and subtraction [E3].
  • Representing and solving subtraction problems using base-ten pieces and number lines [E2].
  • Practicing multidigit addition and subtraction [E4].
  • Recognizing that different partitions of a number have the same total (e.g., 100 + 20 + 3 = 100 + 10 + 13) [E1].
  • Connecting mathematics and social studies.
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Materials for the Teacher

Unit 7 Assessment Record
Math Facts Class Record
map of Europe, North Africa, and the Middle East, optional
abacus, optional

Assessment in this Lesson

Assessment Expectation Assessed

Helping Leonardo the Traveler Solve Problems
with Feedback Box
Student Activity Book
Pages 247–253
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.
E3.
Subtract multidigit numbers using mental math strategies (composing and decomposing numbers and counting up).
E4.
Subtract multidigit numbers using paper-and-pencil methods (e.g., expanded form and compact).

Home Practice Part 3
Teacher Guide - digital
E4.
Subtract multidigit numbers using paper-and-pencil methods (e.g., expanded form and compact).
E5.
Estimate differences using mental math strategies (e.g., rounding using benchmarks, using convenient numbers, composing and decomposing numbers, counting up and counting back).

DPP Item T
Problem Solving: The Last Six Facts
Teacher Guide - digital
E10.
Use fact strategies, drawings, and number sentences to solve word problems involving multiplication facts for the last six facts (4 × 6, 4 × 7, 4 × 8, 5 × 7, 6 × 8, 7 × 8).

Vocabulary in this Lesson