# Adding Fractions with Unlike Denominators

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## Interactive Math Activity - Adding Fractions with Unlike Denominators

Give your fifth-grade students an opportunity to practice adding fractions with unlike denominators in this engaging math activity from iKnowIt.com. Students will find the sum of two fractions with unlike denominators and simplify their answer if possible. Your students will practice finding a common denominator and writing equivalent fractions to solve each fraction addition problem. After completing this online math lesson, your class will be experts at adding fractions with unlike denominators.

Students will be engaged and challenged by the math problems in this online math game. Students may be asked to find the sum of 9/10 and 2/4. They may be required to find the sum of 2/9 and 6/7. Or they may need to solve a word problem like this one: "Trinity Elementary School is having a fundraiser at Pete's Pizza. 7/12 of Mr. Brandt's class and 7/9 of Mrs. Flaum's class came to the fundraiser. What fraction of their classes came to the fundraiser? Simplify if possible." If students get stuck on a question, they can click on the "Hint" button for a helpful clue. They will be prompted to find the common denominator and write equivalent fractions. When students answer a question incorrectly, they will be shown a detailed explanation page that reveals the correct answer and how to obtain it.

All math lessons on iKnowIt.com, including this fifth-grade fraction lesson, contain handy tools and features that help students make the most out of their math practice time. A progress-tracker in the upper-right corner of the practice screen shows students how many questions they have answered out of the total number of questions in the lesson. A score-tracker lets them see how many points they have earned so far. The speaker icon in the upper-left corner of the practice screen indicates the read-aloud feature; when students click the button, the question will be read out loud to them in a clear voice. This is a great resource for ESL/ELL students and students who are auditory processors.

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Teachers, homeschool educators, and students alike find our online math program helpful, engaging, and fun! Use the I Know It math practice program alongside your traditional math curriculum for extra practice and see for yourself the difference interactive math can make! Teachers and homeschool educators appreciate the wide variety of math lessons we offer, featuring the most popular math topics in kindergarten through fifth grade. All of our math lessons are aligned to the Common Core Standard and are arranged by grade level and topic, making it easy for you to find exactly what you need right when you need it. Students enjoy practicing math skills on iKnowIt.com because our lessons are engaging and fun. Whimsical animated characters cheer students on in their practice sessions, while positive feedback and the opportunity to earn math awards give students incentive to keep going. It's like a fun, yet challenging, math game!

We hope you will try out this fifth-grade fractions lesson with your students today! Remember to browse our extensive collection of math lessons for other topics your class will enjoy.

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Your I Know It membership unlocks the website's handy administrative tools, which make it easy for you to monitor your students' progress through their math practice. Our administrative features allow you to create a class roster and add your students to it, assign unique usernames and passwords to each of your students, change basic lesson settings (like turning the animated characters on or off), assign different lessons to individual students, print, download, and email student progress reports, and much more.

When your students log into I Know It with their unique username and password, they will be shown a kid-friendly version of the homepage. From here they can access the math lessons you have assigned to them. If you choose to give them access, they can also try out other math activities at their grade level and even explore other grade levels for an added challenge or extra review. Grade levels in the student mode of I Know It are labeled with letters instead of numbers (i.e. "Level E" for fifth grade), making it easier for you to assign lessons based on an individual student's skill level.

## Level

This interactive math lesson is classified as Level E. It may be ideal for your fifth-grade class.

## Common Core Standard

5.NF.1, 5.NF2, MA.5.FR.2.1, MA.5.AR.1.2 , 5.3H
Number And Operations - Fractions

Use Equivalent Fractions As A Strategy To Add And Subtract Fractions.
Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)

## You might also be interested in...

Adding Mixed Numbers with Unlike Denominators (Level E)
In this fifth-grade level math lesson, students will practice adding mixed numbers with unlike denominators. Students will find the sum and simplify if possible.

Adding and Subtracting Fractions with Unlike Denominators (Level E)
Students will practice adding and subtracting fractions with unlike denominators in this interactive math lesson geared toward fifth grade. Students will find the sum or difference and simplify if possible.