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.

- 6.1 Models to Subtract 2-Digit Numbers
- 6.2 Two-Digit Number Subtractions
- 6.3 Models to Subtract 3-Digit Numbers
- 6.4 Three-Digits Number Subtractions
- 6.5 Exploring Subtracting Across Zero
- 6.6 Relation between Addition and Subtraction
- 6.7 Write Subtraction Equations
- 6.8 Pictures and Equations for Problem Solving

- 9.1A Using 3 and 4 as Factors
- 9.1B Mix multiplication
- 9.2A Using 6 and 7 as Factors
- 9.2B Skipping by mix numbers
- 9.3 Using 8 as a Factor
- 9.4 Using 11 and 12 as Factors
- 9.5 3-Factors Multiplication
- 9.6 Multiplication with Numbers Ending at Zero
- 9.7 Identifying Squares in Multiplication
- 9.8 Write and Compare Multiplication Facts

- 13.1 Exploring Repeating Patterns
- 13.2 Applying Number Sentences
- 13.3 Using Extending Tables
- 13.4 Writing Rules for Situation in Identifying Patterns
- 13.5 Converting Word Expressions in Patterns
- 13.6 Finding Geometric Patterns
- 13.7 Equality or Inequality in Patterns
- 13.8 Acting Out and Using Reasoning in Problem Solving

- 15.1 Circle: Identifying Center, the Radius, and the Diameter of Circle
- 15.2 Flip and Slide Objects Horizontally and Vertically
- 15.3 Turn/Rotation about 90° and 180°
- 15.4 Making and Testing Generalizations in Problem Solving
- 15.5 Using Motion and Congruent Figures
- 15.6 Identifying Lines of Symmetry
- 15.7 Drawing Shapes with Lines of Symmetry

- 22.1 Measure Length, Centimeters, and Decimeters
- 22.2 Using Meters and Kilometers
- 22.3 Convert Metric Units of Length
- 22.4 Metric Units of Capacity
- 22.5 Convert Metric Units of Capacity
- 22.6 Measuring of Metric Units of Mass
- 22.7 Convert Metric Units of Mass
- 22.8 Choose Appropriate Units of Measurements
- 22.9 Making Tables and Looking for Patterns in Problem Solving

- 23.1A Perimeter
- 23.1B Perimeter
- 23.4 Area
- 23.5 Estimating Area
- 23.6 Volume
- 23.7 Solving Simple Problems

- 24.1 Reading Time in Half and Quarter Hours
- 24.2 Reading Time in Minutes
- 24.3 Understanding Unit of Time
- 24.4 Computing Elapsed time
- 24.5 Convert Times into Different Units
- 24.6 Convert Hours to Day and Conversely
- 24.7 Reading Time Schedule
- 24.8 Temperature
- 24.9 Read a Calendar
- 24.10 Working Backwards in Problem Solving

- 25.1A Multiplication Using Mental Math
- 25.1B Multiplication Using Mental Math
- 25.2 Product Estimation
- 25.3A Exploring Array and Multiplication
- 25.3B Exploring Array and Multiplication
- 25.4 Multiplication by Breaking Apart
- 25.5 Exploring Expanded Algorithms
- 25.6A Multiply 2-Digit Numbers and 3-Digit Numbers by 1-Digit Number
- 25.6B Multiply 2-Digit Numbers and 3-Digit Numbers by 1-Digit Number
- 25.7 Multiplication Patterns over Increasing Place Values
- 25.8 Draw Pictures and Write Number Sentences to Solve Problems

- 27.1 How to Organize Data
- 27.2 Exploring Mixed Problem Solving
- 27.3 Reading and Drawing Pictographs
- 27.4 Reading and Drawing Bar Graphs
- 27.5 Using Ordered Pairs and Line Graphs
- 27.6 Certain, Likely, Unlikely, and Impossible
- 27.7 Predicting Outcomes from Experiments
- 27.8 Applying Line Plots and Experiments
- 27.9 Using Graphs and Tables to Draw Conclusions

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