Khan Academy
Khan Academy: Add/ Subtract Mixed Numbers W Unlike Denominators (No Regrouping)
Practice adding and subtracting mixed numbers with different denominators. No regrouping required.
Math Is Fun
Math Is Fun: Common Denominator
Learn the "easiest method" for finding the common denominator of two fractions with different denominators. View animated examples and look over the steps that it takes to find a common denominator and add two fractions.
Houghton Mifflin Harcourt
Holt, Rinehart and Winston: Homework Help Independent Practice: Add and Subtract Rational Numbers 2
Get independent practice adding and subtracting fractions with unlike denominators. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.
Khan Academy
Khan Academy: Add and Subtract Fractions Challenge
Challenge problems involving adding and subtracting fractions that have unlike denominators.
Khan Academy
Khan Academy: Add and Subtract Fractions Word Problems
Practice solving fraction addition and subtraction word problems. The fractions in these problems have unlike denominators.
Lawrence Hall of Science
The Math Page: Skill in Algebra: Adding Algebraic Fractions
Here is a site that clearly and thoroughly explains adding algebraic fractions (rational expressions) both with common denominators and with different denominators. There are example problems solved, problems for the student to attempt,...
Common Core Sheets
Common Core Sheets: Number and Operations Fractions 5.nf.2 Worksheets
Worksheets provide practice with solving adding and subtracting fractions with answer keys are provided. You can even create your own learning exercise or flash cards.
PBS
Pbs: The Lowdown: A Rhythm Etic
Rock out to a musical demonstration of math involved in constructing rhythms from groups of beats in this video from KQED. In the accompanying classroom activity, students consider how the note durations comprising a measure in 3/4 time...
Math Is Fun
Math Is Fun: Addition of Fractions
This very basic website gives simple, easy steps on how to add fractions with the same denominator and what to do when they have different denominators.
Teaching Treasures Publications
Teaching Treasures: Year Five Math (Page 5)
Sharpen your computation skills with this interactive worksheet. The focus is adding and subtracting fractions with like and unlike denominators and reducing to lowest terms. Problems are set up horizontally and answers can be checked...
Texas Instruments
Texas Instruments: Rational Addition, Subtraction
This StudyCard stack covers adding (or subtracting) numerators with simple to complex denominators. The set ends with sums or differences of rational functions with different denominators.