Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Percent of a Number
This Math Page tutorial explains how to find the percent of a number and features a practice to check comprehension.
Visual Fractions
Visual Fractions: Add Fractions With Number Line or Circle Models
This site is provided for by Visual Fractions. Add mixed numbers with like denominators using circles. Click on the "Explain" button to understand the answer.
AAA Math
Aaa Math: Adding Mixed Numbers With the Same Denominator
This site explains how to add mixed numbers that have the same denominator, and includes games to practice this skill.
AAA Math
Aaa Math: Subtracting Mixed Numbers
This site explains how to subtract mixed numbers that have the same denominators. The site provides games to practice this skill.