Description
Students add and subtract decimals using several models. Of particular importance is the place-value model represented with base-ten blocks. As students solve addition problems with base-ten blocks where the flat is equal to one, the long is equal to one-tenth and the small cube is equal to one-hundredth, they are led to see that when adding decimals, the hundredths can be combined with hundredths, the tenths with tenths, and so on. They see that similar reasoning can be applied to subtraction. These experiences help students to look for and make use of structure as they make sense of place-value algorithms for adding and subtracting decimals.
The lessons accompany and are based on Go Math textbook (5th Grade), with rich content and higher level questions. The lessons can stand on their own even if the instructors does not use Go Math, where alternative practice exercises can be utilized.
Table of Contents
Lesson 3.1 Investigate ● Thousandths
Lesson 3.2 Place Value of Decimals
Lesson 3.3 Compare and Order Decimals
Lesson 3.4 Round Decimals
Lesson 3.5 Investigate ● Decimal Addition
Lesson 3.6 Investigate ● Decimal Subtraction
Lesson 3.7 Estimate Decimal Sums and Differences
Lesson 3.8 Add Decimals
Lesson 3.9 Subtract Decimals
Lesson 3.10 Algebra ● Patterns with Decimals
Lesson 3.11 Problem Solving ● Add and Subtract Money
Lesson 3.12 Choose a Method
Related Products:
Chapter 1 Place Value, Multiplication and Expression
Chapter 2 Divide Whole Numbers
Chapter 4 Multiply Decimals
Chapter 5 Divide Decimals
Chapter 6 Add & Subtract Fractions
Chapter 7 Multiply Fractions
Chapter 8 Divide Fractions
Chapter 9 Algebra: Patterns & Graphing
Chapter 10 Convert Units of Measure
The lessons accompany and are based on Go Math textbook (5th Grade), with rich content and higher level questions. The lessons can stand on their own even if the instructors does not use Go Math, where alternative practice exercises can be utilized.
Table of Contents
Lesson 3.1 Investigate ● Thousandths
Lesson 3.2 Place Value of Decimals
Lesson 3.3 Compare and Order Decimals
Lesson 3.4 Round Decimals
Lesson 3.5 Investigate ● Decimal Addition
Lesson 3.6 Investigate ● Decimal Subtraction
Lesson 3.7 Estimate Decimal Sums and Differences
Lesson 3.8 Add Decimals
Lesson 3.9 Subtract Decimals
Lesson 3.10 Algebra ● Patterns with Decimals
Lesson 3.11 Problem Solving ● Add and Subtract Money
Lesson 3.12 Choose a Method
Related Products:
Chapter 1 Place Value, Multiplication and Expression
Chapter 2 Divide Whole Numbers
Chapter 4 Multiply Decimals
Chapter 5 Divide Decimals
Chapter 6 Add & Subtract Fractions
Chapter 7 Multiply Fractions
Chapter 8 Divide Fractions
Chapter 9 Algebra: Patterns & Graphing
Chapter 10 Convert Units of Measure
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Highlights
Description
Students add and subtract decimals using several models. Of particular importance is the place-value model represented with base-ten blocks. As students solve addition problems with base-ten blocks where the flat is equal to one, the long is equal to one-tenth and the small cube is equal to one-hundredth, they are led to see that when adding decimals, the hundredths can be combined with hundredths, the tenths with tenths, and so on. They see that similar reasoning can be applied to subtraction. These experiences help students to look for and make use of structure as they make sense of place-value algorithms for adding and subtracting decimals.
The lessons accompany and are based on Go Math textbook (5th Grade), with rich content and higher level questions. The lessons can stand on their own even if the instructors does not use Go Math, where alternative practice exercises can be utilized.
Table of Contents
Lesson 3.1 Investigate ● Thousandths
Lesson 3.2 Place Value of Decimals
Lesson 3.3 Compare and Order Decimals
Lesson 3.4 Round Decimals
Lesson 3.5 Investigate ● Decimal Addition
Lesson 3.6 Investigate ● Decimal Subtraction
Lesson 3.7 Estimate Decimal Sums and Differences
Lesson 3.8 Add Decimals
Lesson 3.9 Subtract Decimals
Lesson 3.10 Algebra ● Patterns with Decimals
Lesson 3.11 Problem Solving ● Add and Subtract Money
Lesson 3.12 Choose a Method
Related Products:
Chapter 1 Place Value, Multiplication and Expression
Chapter 2 Divide Whole Numbers
Chapter 4 Multiply Decimals
Chapter 5 Divide Decimals
Chapter 6 Add & Subtract Fractions
Chapter 7 Multiply Fractions
Chapter 8 Divide Fractions
Chapter 9 Algebra: Patterns & Graphing
Chapter 10 Convert Units of Measure
The lessons accompany and are based on Go Math textbook (5th Grade), with rich content and higher level questions. The lessons can stand on their own even if the instructors does not use Go Math, where alternative practice exercises can be utilized.
Table of Contents
Lesson 3.1 Investigate ● Thousandths
Lesson 3.2 Place Value of Decimals
Lesson 3.3 Compare and Order Decimals
Lesson 3.4 Round Decimals
Lesson 3.5 Investigate ● Decimal Addition
Lesson 3.6 Investigate ● Decimal Subtraction
Lesson 3.7 Estimate Decimal Sums and Differences
Lesson 3.8 Add Decimals
Lesson 3.9 Subtract Decimals
Lesson 3.10 Algebra ● Patterns with Decimals
Lesson 3.11 Problem Solving ● Add and Subtract Money
Lesson 3.12 Choose a Method
Related Products:
Chapter 1 Place Value, Multiplication and Expression
Chapter 2 Divide Whole Numbers
Chapter 4 Multiply Decimals
Chapter 5 Divide Decimals
Chapter 6 Add & Subtract Fractions
Chapter 7 Multiply Fractions
Chapter 8 Divide Fractions
Chapter 9 Algebra: Patterns & Graphing
Chapter 10 Convert Units of Measure
Report this resource to TPT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.
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Questions & Answers
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Standards
to see state-specific standards (only available in the US).
CCSS5.NBT.A.1
Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
CCSS5.NBT.A.3a
Read and write decimals to thousandths using base-ten numerals, number names, and expanded form, e.g., 347.392 = 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000).
CCSS5.NBT.A.3b
Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.
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