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Showing Results for adding subtracting

Start your students on subtracting three-digit numbers with this lesson that breaks the problems down by place values!

Fluently Subtracting within 1000

Continue to build on your students' understanding of unlike denominators by asking students to justify their answers of fraction subtraction. Use this lesson with the Subtracting Fractions with Different Denominators lesson.

Subtracting Fractions Justifications

Teach your students to add and subtract fractions with like denominators using a strategy that works for both operations: converting mixed numbers into improper fractions and back again!

Single Strategy for Adding and Subtracting Mixed Numbers

Students will practice subtracting decimal numbers by calculating the total of prominent political figures’ meals at a pizzeria. Then, students can create and solve their own word problems using the menu on the activity.   

Subtracting Decimals: Presidential Problems at the Pizza Place

Children often wonder if algorithms are practical. Using this lesson plan, your students will see how the standard algorithm for adding mixed numbers brings life to real world real-world situations.

Word Problems: Adding Mixed Number Fractions

Adding big numbers can be tricky, but this lesson introduces your students to a strategy that makes it less intimidating! Using the place value strategy will make the task less daunting.

Fluently Adding Within 1000

Subtracting decimals to the thousandths can be fun when you are using actual statistics from Major League Baseball. Students will learn a little about how averages are calculated and then compare statistics of some of baseball's top players.

Comparing Batting Averages: Subtracting to the Thousandths

Many students cringe when they see a subtraction problem with multiple zeros. The “Subtract One” strategy in this lesson involves reducing the top number by one to turn the 0 digits into 9’s and then adding the one back in at the end.

“Subtract One” Strategy: Subtracting From Zeros Without Borrowing

This lesson is designed for fourth graders to practice their skills with the order of operations along with multiplying fractions and adding or subtracting decimals. 

Order of Operations with Fractions and Decimals

Finding the least common multiple is an essential skill for comparing, adding, and subtracting fractions! This lesson introduces students to this concept in an interactive way.

Clap Counting with Multiples

Adding fractions with unlike denominators just doesn't work like it does when the denominators are the same. Let's make it work! Students will add fractions with unlike denominators with sums between one and two.

Make It Work! Adding Fractions with Unlike Denominators

Students will have fun adding larger numbers using an open number line, first by practicing and then playing a dice game in pairs or triads called Go Froggie!

Adding Three-Digit Numbers on an Open Number Line with Froggie Game

Getting ready to subtract fractions? This lesson reviews how to subtract like denominators and teaches students how to subtract unlike denominators. The focus is on understanding the process and reasoning behind each step.

Subtracting Fractions with Different Denominators

Students will find angle sums using a baseball diamond diagram.

Adding Angles

In this lesson, students will practice explaining the process of subtracting numbers up to 1,000 using base-ten blocks and peer feedback. Use this lesson on its own or as support to the lesson Fluently Subtracting within 1,000.

Sharing the Subtraction Process

Encourage students to explain their processes when converting from a mixed number to an improper fraction, and back again. Use this lesson on its own or as support to the lesson Single Strategy for Adding and Subtracting Mixed Numbers.

Explain Fraction Conversions

It's as easy as one, two, three...four! Introduce your students to subtracting decimals in the tenth and hundredth place using a four-step process.

Step By Step Decimal Subtraction

Teach your students to subtract mixed numbers with like denominators using the strategy of decomposition. This strategy helps students to manipulate and break down numbers to help them solve tricky subtraction problems. 

Subtracting Mixed Numbers Using the Decomposition Strategy

This lesson challenges young learners to add dialogue to their writing. Students will love using their creativity to write personal narratives. 

Narrative Writing: Adding Dialogue

Getting ready to add fractions? This lesson reviews how to add fractions with unlike denominators using number lines. Students will focus on understanding the process and reasoning behind each step.

Adding Fractions on Number Lines

Empower students to think like mathematicians by having them create word problems related to subtracting mixed numbers. Use this lesson on its own or as support to the lesson Subtracting Mixed Numbers Using the Decomposition Strategy.

Writing Questions for Word Problems

Solve for the sum of two mixed numbers! They will use scaffolds such as fraction models to support the visualization of mixed numbers. This can be used on its own or as support for the lesson Sums for Mixed Numbers and Improper Fractions. 

Adding Like Mixed Numbers

Start a dialogue around area models! In this lesson, encourage students to ask questions as they multiply using area models. Use this lesson on its own or as support to the lesson Area Models and Multiplication.

Area with Multiplying and Adding

Make the number work for you! Use this lesson to teach your students to add mixed numbers with like denominators using the strategy of decomposition.

Adding Mixed Numbers Using the Decomposition Strategy

In this lesson, students will practice strategies of subtracting time and apply them to real life scenarios. Also, use this game with the lesson that teaches addition of elapsed time called Beyond Just Addition.

Get There On Time: Elapsed Time Word Problem Strategies

Students will create angles by folding construction paper, creating angle addition sentences, and then adding the sum of angles on their models.

Folding for Angles

In this hands on lesson, students create squares with different fraction pieces while building their knowledge of adding fractions with different denominators.

Building Squares

During this lesson, students will learn how to edit their writing. They will edit their writing by adding variety to their sentences. Students will also work on writing sentences that are clearer to the reader.

Sentence Variety

Help your students learn new vocabulary in this hands-on lesson. Your class will learn new words by adding a silent e on the end of familiar CVC words.


Silent E Springing Up

Help your students show their understanding as they explain how to add fractions with unlike denominators. Use this lesson on its own or as support to the lesson Make It Work! Adding Fractions with Unlike Denominators.

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Showing Results for adding subtracting