Common Denominators Teacher Resources

These presentations, designed by Monica Yuskatis, are among the best math PowerPoints you can find. Use this one to lead your pupils through the steps needed to subtract fractions with like denominators, then simplify the answers into...

Show your students this presentation to help them understand how to add fractions with like denominators. Sal adds 3/15 to 7/15 and then simplifies his answer. He uses drawings and multiple colors to show the actual process.

Adding fractions that are in rational expression form? Do they have a common denominator? No? Well, then the least common denominator needs to be found. How is the least common denominator of rational expression found? Watch this video...

Put fractions with different original denominators in order using the least common denominator. Once she has shown how to find the least common denominator, an instructor constructs equivalent fractions that are more easily compared to...

This series of presentations on fractions by Monica Yuskaitis is quite good. In this one, she has learners practice the skill of adding fractions with like denominators, then simplifying their answers. Feedback is given for each answer...

Put fractions with different original denominators in order using the least common denominator. Once she has shown how to find the least common denominator, an instructor constructs equivalent fractions that are more easily compared to...

Fifth and sixth graders solve 12 math problems by finding the least common multiple or least common denominator. They type the answer into the text box.

In this adding mixed numbers worksheet, students find the sums by adding mixed numbers with common denominators and reducing the answer to lowest terms. Students solve 7 problems.

Young scholars solve 14 problems in which mixed numbers with like denominators are subtracted. An example is provided on this page.

Elementary school students can observe Sal as he subtracts fractions that have a common denominator. Because this concept is fairly straight forward, he focuses on simplifying his answer. A great video for those needing extra support in...

For this fraction instructional activity, fourth and fifth graders solve six word problems, all having to do with adding or subtracting fractions with like denominators. This instructional activity can be adapted to the Common Core...

Students investigate the concept of adding fractions with like denominators. They review how to combine the numerators. Students use cutouts to handle fractions that are hands on while comparing them to slices of pizza. They work...

Find the easiest common denominator. A video demonstrates finding a common denominator to add fractions. Pupils learn how to find a common denominator by using the product of the two denominators. After finding the common denominator,...

Help your class take on the least common denominator by providing them with this informational video. The video gives a definition of the least common denominator and includes an example using 2 algebraic fractions. This is definitely a...

Help your class take on the least common denominator by providing them with this informational video. The video gives a definition of the least common denominator and includes an example using two algebraic fractions. This is definitely...

Now that the practice is over, see if young mathematicians can utilize their new skills on finding common denominators and adding fractions. The assessment contains one map challenge and follows with skills practice. 

Start by subtracting the whole numbers and then the fractions! Learners solve subtraction problems with like denominators (no regrouping required). Good, basic practice when it comes to fractions!

In this adding mixed numbers practice worksheet, students solve 14 problems that require them to add mixed numbers that have like denominators.

In this mixed number addition worksheet, students solve a total of 7 problems, adding mixed numbers with like denominators. An example problem appear at the top of the worksheet.

In this mixed number addition activity, learners add a total of 14 problems, using mixed numbers with like denominators. An example problem appears at the top of the activity.

In this fraction learning exercise, students solve 6 word problems that have to do with adding or subtracting fractions with like denominators. All answers are to be reduced to simplest form.

Develop a strategy for adding and subtracting fractions with your classes. The video shows a procedure for adding and subtracting fractions by finding common denominators. Each example increases in difficulty.

Looking to drill your upper elementary schoolers on their ability to add mixed numbers with like denominators? A cartoon at the top reminds learners how to tackle each problem (starting with the whole numbers and moving to the...