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Add, subtract, and multiply decimals

# Add, subtract, and multiply decimals

Unit 1: FLUENCIES AND THE LANGUAGE OF ALGEBRA

Lesson 5 of 9

Lesson 5 of 9

## Objective: SWBAT add, subtract, and multiply decimals

## Big Idea: To line it up or not line it up? That is the question... about the decimal. Beyonce and Snowmen round out the lesson.

Subject(s):

Math, Number Sense and Operations, Algebra, Numbers and Operations, practice and fluency, decimal numbers, properties of arithmetic, practice and

*75 minutes*

1

#### Warm-up

*10 min*

Each day, students complete a warm-up that usually consists of spiraling the previous day's material, in addition to older material. Warm-up problems also sometimes extend lessons that students have encountered before to more unfamiliar contexts.

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4

#### Homework

*15 min*

The homework includes questions related to this lesson, as well as spiraled review. I also provide answers to the problems on page 2.

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###### Adding and Subtracting Integers on a Number Line

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Big Idea:
What happens when you add positive 5 and negative 3? What happens when you subtract positive 2 from negative 3? Students work with a number line and football to model adding and subtracting integers.

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Somerville, MA

Environment: Urban

Environment: Urban

New Orleans, LA

Environment: Urban

Environment: Urban

Elon, NC

Environment: Suburban

Environment: Suburban

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- UNIT 1: FLUENCIES AND THE LANGUAGE OF ALGEBRA
- UNIT 2: SOLVING LINEAR EQUATIONS
- UNIT 3: INTRODUCTION TO FUNCTIONS
- UNIT 4: INTERPRETING AND COMPARING LINEAR FUNCTIONS
- UNIT 5: SYSTEMS OF LINEAR EQUATIONS
- UNIT 6: EXPONENTS AND SCIENTIFIC NOTATION
- UNIT 7: PARALLEL LINES, TRANSVERSALS, AND TRIANGLES
- UNIT 8: CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS
- UNIT 9: PATTERNS OF ASSOCIATION IN BIVARIATE DATA
- UNIT 10: SLOPE REVISITED
- UNIT 11: VOLUME OF CYLINDERS, CONES, AND SPHERES
- UNIT 12: POLYNOMIALS AND FACTORING
- UNIT 13: QUADRATIC FUNCTIONS

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- LESSON 1: Day One
- LESSON 2: Add and subtract positive and negative numbers
- LESSON 3: Multiply and divide positive and negative numbers
- LESSON 4: Develop fluency with positive and negative numbers
- LESSON 5: Add, subtract, and multiply decimals
- LESSON 6: Divide decimals
- LESSON 7: Evaluate expressions using substitution (Day 1 of 2)
- LESSON 8: Evaluate expressions using substitution (Day 2 of 2)
- LESSON 9: ASSESSMENT #1

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