Pre-Algebra Help

Basics

Adding
Addition-AAA Addition of Integers-MG Mental Arithmetic Drills-US	Addition Practice-WMO Adding decimals-MW Adding and subtracting integers-WMO

Subtracting
Subtraction-AAA Subtracting numbers-MW Subtracting integers-MW Subtraction Practice-WMO	Mental Arithmetic Drills-US Subtracting decimals-MW

Rounding & Estimating
Estimation-AAA Significant digits-PM Rounding decimals-MW	Rounding-PM Rounding to a whole number-MW Estimating and rounding-WMO

Multiplying
Multiplication-AAA Multiplying and dividing integers-MW Multiplying decimals-MW Multiplying and dividing integers-WMO	Mental Arithmetic Drills-US Carrying numbers when multiplying-MW Multiplication Practice-WMO
Dividing
Division-AAA Strategy for dividing really big numbers-MW Division Practice-WMO	Mental Arithmetic Drills-US The parts of division-MW Divide Decimals-TMP
Absolute Value
Absolute Value-PM
Exponents
Exponents-PM Exponents of Numbers-AH Exponents of Numbers Worksheet-AH Exponents of Variables-AH Exponents of Variables Worksheet-AH Fractional powers-UCL Graphs of fractional powers-UCL Negative integer powers-UCL	Negative Exponents-AH Negative Exponents Worksheet-AH Negative Exponents of Variables-AH Negative Exponents of Variables Worksheet-AH Negative Exponents in Fractions-AH Negative Exponents in Fractions Worksheet-AH Exponents-WMO Laws for manipulating powers-UCL
Order of Operation
Order of operations-MW Order of Operation-MWO	Order of Operations-PM Order of Operations-AH Order of Operations Worksheet-AH
Solving Story Problems
Writing Algebraic Equations1-MG Interest-WMO	Integer Story Problems-MG
Area Problems
Circle Area-MG Geometric Formulas-PM	Formulas-AH
Perimeter Problems
Circle Circumference-MG	Polygon Perimeters-MG
Fractions
Fractions-AAA Adding fractions-MW Multiplying fractions-MW Multiplying a fraction and a whole number-MW What is a reciprocal?-MW Writing Fractions as Percents-MG Definitions-WMO Adding and subtracting-WMO Dividing-WMO Equivalent Fractions-TMP Fractions into Decimals-TMP Multiply & Divide Fractions-TMP	Factoring Numbers-PM Fractions-PM What is a fraction?-MW Subtracting fractions-MW Dividing fractions-MW Dividing a fraction and a whole number-MW Changing a fraction to a percentage-MW Reducing a fraction-MW Strategy for integer fractions-MW Reducing fractions-WMO Multiplying-WMO Proper & Improper, Mixed Numbers-TMP
Decimals
Decimals-AAA Decimal Numbers-WMO Multiplying decimals-WMO Meaning of Decimals-TMP	Adding & Subtracting decimals-WMO Dividing decimals-WMO
Lowest Terms
Factors and multiples-WMO Least common multiple (LCM)-WMO Greatest common factor (GCF)-WMO	Divisibility Tests-MG LCM and GCF-PM Finding the lowest common denominator-MW
Ratio & Proportion
Ratios-AAA Proportion Basics-AH What is cross-multiplying?-MW Ratios-WMO Distance, rates, and time-WMO Formulas-WMO Ration & Proportion 2-TMP	Ratio & Proportion-PM Solving rate problems-MW Solving proportion problems-MW Proportions-WMO Similar figures-WMO Ratio & Proportion 1-TMP Proportionality-TMP
Percents
Percents and Ratios-AAA Meaning of Percents-MG Changing a percentage to a fraction-MW Percent-WMO Percents with a Calculator-TMP Percent of a Number-TMP Percent Increase or Decrease-TMP	Percents Challenge Exercises-MG Converting between Percents, Decimals, and Fractions-PM Percents are Ratios-TMP Method of Proportions-TMP
Square Roots and Radicals
Radicals-PM Moderate Exercises Square Roots and Other Radicals-US	Introductory Exercises Square Roots and Other Radicals-US Advanced Exercises Square Roots and Other Radicals-US Square roots-WMO
Measurement
Measurements-AAA Money-AAA	Units & Measurements Conversion-WMO Consumer Math-AAA