6th Grade Math Worksheets: FREE & Printable - Effortless Math 6th Grade Mathematics Concepts Whole Numbers Rounding Whole Number Addition and Subtraction Whole Number Multiplication and Division Rounding and Estimates Fractions and Decimals Simplifying Fractions Adding and Subtracting Fractions Multiplying and Dividing Fractions Adding and Subtracting Mixed Numbers Multiplying and Dividing Mixed Numbers