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MentalMath offers hundreds of first grade math skills and games to explore and learn! Not sure where to start? Go to your personalized Recommendations wall to find a skill that looks interesting, or select a skill plan that aligns to your textbook, state standards, or standardized test.

1 Number Concepts Part I

  1. 1.1A Number Constructions
  2. 1.1B Number Constructions
  3. 1.2 Compare and Order Numbers
  4. 1.3A Introduction to Exponents
  5. 1.3B Introduction to Exponents
  6. 1.3C Introduction to Exponents
  7. 1.3D Introduction to Exponents
  8. 1.4 Perfect squares and Their Roots
  9. 1.5 Patterns, Sequences, and Terms

2 Number Concepts Part II

  1. 2.1A Introducing Roman Numerals
  2. 2.1B Introducing Roman Numerals
  3. 2.2A Introduction to Decimals
  4. 2.2B Introduction to Decimals
  5. 2.2C Introduction to Decimals
  6. 2.3A Special Decimal Numbers
  7. 2.3B Special Decimal Numbers
  8. 2.4A Order Decimals
  9. 2.4B Order Decimals
  10. 2.5A Estimate Decimals
  11. 2.5B Estimate Decimals

3 Introduction to Algebra

  1. 3.1 Writing Variable Expressions
  2. 3.2 Operations Properties
  3. 3.3 Order of Operations
  4. 3.4A Distributive Property
  5. 3.4B Distributive Property

4 Steps toward Algebra

  1. 4.1 Step toward Algebra: Mental Math
  2. 4.2 Step toward Algebra: Evaluating Expressions
  3. 4.3 Step toward Algebra: Using Expressions to Describe Patterns
  4. 4.4 Problem Solving by Making a Table

5 Decimal Arithmetic

  1. 5.1 Estimating Decimals, Sums and Differences
  2. 5.2 Decimal Arithmetic: Adding and Subtracting
  3. 5.3 Decimal Arithmetic: Estimate Products and Quotients
  4. 5.4 Decimal Arithmetic: Multiplying Decimals
  5. 5.5 Mixed Problem Solving

6 More Advanced Decimal Concepts

  1. 6.1 Dividing a Decimal Number by a Whole Number
  2. 6.2 Dividing a Whole Number by a Decimal Number
  3. 6.3A Dividing Two Decimals
  4. 6.3B Dividing Two Decimals
  5. 6.4A Evaluating Decimal Expressions
  6. 6.4B Evaluating Decimal Expressions
  7. 6.5 Working with Scientific Notations
  8. 6.6 Solving Multistep Problems

7 Steps toward Algebra: Solving Equations

  1. 7.1 Step toward Algebra: Properties of Equality
  2. 7.2 Solving Equations Using the Addition Property of Equalities
  3. 7.3 Solving Equations Using the Subtraction Property of Equalities
  4. 7.4 Solving Equations Using the Division Property of Equalities
  5. 7.5 Solving Equations Using the Multiplication Property of Equalities
  6. 7.6 Problems Solving: Draw a Picture to Assist in Writing the Equation

8 Introduction to Fraction Concepts

  1. 8.1 Factors and Multiples
  2. 8.2 Rules of Divisibility
  3. 8.3 Finding Primes Using Prime Factorization
  4. 8.4 Greatest Common Factor (GCF)
  5. 8.5 Introduction to Fractions
  6. 8.6 Equivalent Fractions
  7. 8.7 Simplifying Fractions
  8. 8.8 Using Conjectures

9 Number Types

  1. 9.1A Relationship between Fractions and Division
  2. 9.1B Relationship between Fractions and Division
  3. 9.2 Convert between Fractions and Decimals
  4. 9.3 Convert between Mixed Number and Improper Fractions
  5. 9.4 Using Decimals with Fractions and Mixed Numbers
  6. 9.5 Problem Solving: Drawing Figures

10 Arithmetic of Fractions and Mixed Numbers Part I

  1. 10.1 Adding and Subtracting Fractions with Like Denominators
  2. 10.2 Least Common Multiple (LCM)
  3. 10.3 Adding and Subtracting Fractions with Unlike Denominators
  4. 10.4 Estimating Sums and Differences of Mixed Numbers
  5. 10.5 Finding Sums of Mixed Numbers
  6. 10.6 Finding Differences between Mixed Numbers
  7. 10.7 Solving Equations Involving Addition and Subtraction of Fractions
  8. 10.8 Problem Solving by Making a Table

11 Arithmetic of Fractions and Mixed Numbers Part II

  1. 11.1 Multiplying Fraction and Integers
  2. 11.2 Estimating Products of Mixed Numbers and Fractions
  3. 11.3 Multiplying Fractions
  4. 11.4 Multiplying Mixed Numbers
  5. 11.5 Solving fraction Equations Using Multiplication
  6. 11.6 Solving Multistep Problems

12 Arithmetic of Fractions and Mixed Numbers Part III

  1. 12.1 Understanding Fraction Division
  2. 12.2 Dividing a Whole Number by a Fraction
  3. 12.3A Dividing Fractions
  4. 12.3B Dividing Fractions
  5. 12.4 Estimating Quotients
  6. 12.5 Mixed Number Division
  7. 12.6 Solving Fraction Equations Using Division
  8. 12.7 Problem Solving: Look for a Pattern

13 Counting Numbers (Z) Part I

  1. 13.1 Understanding Integers (Z) Using a Number Line
  2. 13.2 Relationship between Integers
  3. 13.3 Relationship between Rational Numbers
  4. 13.4 Adding Integers Using a Number Line
  5. 13.5 Subtracting Integers Using a Number Line
  6. 13.6 Adding and Subtracting Integers Using Tables

14 Counting Numbers (Z) Part II

  1. 14.1A Integer Multiplication
  2. 14.1B Integer Multiplication
  3. 14.2A Integer Division
  4. 14.2B Integer Division
  5. 14.3 Steps toward Algebra: Solving Integer Equations
  6. 14.4 Steps toward Algebra: Notating and Graphing Points on a Coordinate Grid
  7. 14.5 Finding Rules from Tables Using Multiplication and / or Division of Integers
  8. 14.6 Working Backward to Solve Problems

15 Two Dimensional Figures Part I

  1. 15.1 Geometry: Points, Lines, and Planes
  2. 15.2 Geometry: Working with Pairs of Line
  3. 15.3 Geometry: Determining Types of Angles
  4. 15.4 Geometry: Working with Pairs of Angles
  5. 15.5 Geometry: Classifying Triangles
  6. 15.6 Geometry: Types of Quadrilaterals
  7. 15.7 Geometry: Part of Circle

16 Two Dimensional Figures Part II

  1. 16.1 Geometry: Polygons
  2. 16.2 Geometric Patterns
  3. 16.3 Geometry: Transformation
  4. 16.4 Geometry: Congruence
  5. 16.5A Geometry: Symmetry
  6. 16.5B Geometry: Symmetry
  7. 16.6 Problem Solving: Make a Table and Look for a Pattern

17 Ratios, Rates, and Proportions

  1. 17.1 Ratios
  2. 17.2 Proportions
  3. 17.3 Rates
  4. 17.4 Rate Comparison
  5. 17.5 Distance = Rate × Time
  6. 17.6 Problem Solving: Sketch a Picture

18 Solving Proportions

  1. 18.1 Working with Ratio Tables
  2. 18.2 Working with Unit Rates
  3. 18.3 Strategies for Solving Proportions
  4. 18.4 Working with Scale Drawings and Maps
  5. 18.5 Problem Solving: Math Explanations

19 Working with Percents

  1. 19.1 Working with Percents
  2. 19.2 Parts of a Whole
  3. 19.3 Special Percents
  4. 19.4 Estimating Percents
  5. 19.5 Find the Percent of a Number
  6. 19.6 Math Challeng

20 Solving Percentage Problems

  1. 20.1 Equations and Their Solutions
  2. 20.2 Unitary Method
  3. 20.3 Profit and Loss
  4. 20.4 Tips, Taxes, and Discount
  5. 20.5 Simple Interest
  6. 20.6 Problem Solving: Reasonableness

21 Working with Equations and Graphs

  1. 21.1 Solving Two-Step Equations
  2. 21.2 Use Patterns/Rules to Solve Equations
  3. 21.3 Use Patterns/Rule to Solve Problems
  4. 21.4 Graphs Linear Equations
  5. 21.5 Graphing Two-Step Equations
  6. 21.6 Indentifying and Interpreting Functions
  7. 21.7 Problem Solving: Separating into Part

22 Measurement

  1. 22.1 Converting Customary Measures
  2. 22.2 Converting Metric Measures
  3. 22.3 Units of Measure and Precision
  4. 2.42 Relating Customary and Metric Measures
  5. 22.5 Elapsed Time
  6. 22.6 Problem Solving: Measurements

23 Two-Dimensional Measurement Formulae

  1. 23.1 Perimeter
  2. 23.2 Areas of Rectangles Based Irregular Figures
  3. 23.3 Areas of Common Plane Figures
  4. 23.4 Circumference of a Circle
  5. 23.5 Area of a Circle
  6. 23.6 Problem Solving Using Objects
  7. 23.7 Math Challeng

24 Three-Dimensional Measurement Formulae

  1. 24.1 Three Dimensional Figures
  2. 24.2 Surface Area (SA)
  3. 24.3 Volumes of Rectangular Prisms
  4. 24.4 Volumes of Cylinders and Triangular Prisms
  5. 24.5 Problem Solving Using Unit Cubes

25 Graphs and Data

  1. 25.1 Making and Interpreting Line and Bar Graphs
  2. 25.2 Drawing and Interpreting Circle Graphs
  3. 25.3 Compare Line and Circle Graphs
  4. 25.4 Problem Solving by Building a Graph
  5. 25.5 Misleading Graphs
  6. 25.6 Building Frequency Tables and Histograms

26 Introduction to Statistics

  1. 26.1 Measures of Central Tendency and the Range
  2. 26.2 Steam-and-Leaf Plots
  3. 26.3 Appropriate Use of Statistical Measures
  4. 26.4 Samples and Surveys
  5. 26.5 Using Statistics to Draw Conclusions
  6. 26.6 Problem Solving: Try, Check, and Revise

27 Probability

  1. 27.1 Possible Outcomes
  2. 27.2A Outcomes Arrangement
  3. 27.2B Outcomes Arrangement
  4. 27.3 Probability
  5. 27.4 Types of Probability
  6. 27.5 Types of Events
  7. 27.6 Problem Solving: Make an Organized List

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