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Showing Results for adding with uncommon denominators

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

Challenge your students to compare two methods for finding the least common multiple between two fractions. Use this lesson on its own or as support for the lesson Make It Work! Adding Fractions with Unlike Denominators.

Compare Common Denominators Methods

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

Increase your students' knowledge of fractions with this lesson that has them compare fractions with different denominators. 

Making Models with Different Denominators

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

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.

Explaining Fraction Addition

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

Does chaos ensue when your students subtract like mixed numbers and the larger fraction has a lesser numerator? Using this lesson plan, teach your class how to overcome this tricky obstacle: When having like denominators isn’t enough! 

When Having Like Denominators Isn’t Enough!

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

Building Squares

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

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

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

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

Students will find angle sums using a baseball diamond diagram.

Adding Angles

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

This scaffolded EL lesson will help your students fluently add within 20, while reinforcing parts of a whole. Use as a pre-lesson for Addition: Over in a Flash, or as a stand alone activity.

Adding Within 20

In this lesson, students will learn how to add a one-digit number to a two-digit number. This will help students build upon the skills needed for regrouping larger numbers.

Adding it All Up

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

When fractions have big numerators and denominators, it can be tough to find the simplest form. Fear not! Use this lesson plan to teach your students to find the simplest form using the greatest common factor. 

Fraction Simplest Form by Greatest Common Factor

Use this scaffolded EL support lesson to help students learn the strategy of decomposing three-digit numbers to add their place values. This lesson can be used alone or prior to teaching Composing and Decomposing to students.

Decomposing and Adding Place Values

In this lesson, students will explore fractions with the same denominators and work as mathematicians to figure out patterns. Your students will gain a lot of practice in comparing fractions!

Comparing Fractions with the Same Denominator

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

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

Inspire creativity in all of your students by giving them the tools they need to transform their simple sentences into longer, detailed descriptions.

STRETCH: Adding Details to Simple Sentences

Help kids master fractions with the fun, fast-paced, math comparison game Fraction Wars. After a review, students are split into pairs to practice quickly comparing fractions with different numerators and denominators.

Fraction Wars

Get the dice out and help students get targeted practice in adding 1 and 10! In this fun place value game, students keep adding to try to get to a maximum score of 100. But be careful. If you go over 100 you’re out!


101 and Out!

Name that hero! In this lesson, your students will practice adding two digit numbers together. They will get more comfortable adding bigger numbers together, making it easier to add three digit numbers later on.

Math Heroes

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

Wondering how to teach your second graders about inflectional endings? Look no further. After playing with dice and learning through song, your students will be adding *-ing* and *-ed* like pros.


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Showing Results for adding with uncommon denominators