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1. The Four Operations - Addition, Subtraction, Multiplication, and Division - Properties of Operations - Order of Operations 2. Decimals - Place Value and Decimal Notation - Decimal Operations: Addition, Subtraction, Multiplication, and Division - Comparing and Rounding Decimals 3. Fractions and Mixed Numbers - Understanding Fractions - Equivalent Fractions and Simplification - Adding, Subtracting, Multiplying, and Dividing Fractions - Mixed Numbers and Improper Fractions 4. Ratios, Rates, Proportions - Ratios and Rates - Solving Proportions - Proportional Relationships 5. Patterns and Sequences - Recognizing Patterns - Arithmetic Sequences - Geometric Sequences 6. Rational Numbers - Rational and Irrational Numbers - Converting between Decimals and Fractions - Operations with Rational Numbers 7. Three-Dimensional Figures - Identifying 3D Shapes - Volume and Surface Area of 3D Figures 8. Two-Dimensional Figures - Properties of 2D Shapes - Perimeter and Area of 2D Figures 9. Problem Solving and Estimation - Problem-Solving Strategies - Estimation Techniques - Word Problems and Applications 10. Pythagorean Theorem - Understanding the Pythagorean Theorem - Applying the Theorem to Solve Problems