Chapter 6 of class 6 Fractions includes Definition of Fractions, Fraction as Division, Types of Fractions, Conversion of Mixed Fractions into Improper Fractions, Conversion of Improper Fractions into Mixed Fractions, Equivalent Fractions, Interesting Fact about Equivalent Fractions, Fractions in Lowest Terms, Like and Unlike Fractions, Comparing Like Fractions, Comparing Unlike Fractions, Addition and Subtraction of Like Fractions, Addition and Subtraction of Unlike Fractions, Inserting a Fraction between Two Given Fractions. RD Sharma solutions cover all the topics which carry a significant weightage of marks for competitive exams. You can see them online or download a PDF file for future use.