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    Mathematics 101

    Receive aemail containing the next unit.
    • Reminder of Fundamentals
      • 1.1Basic Arithmetics
      • 1.2Introduction to Numbers
      • 1.3Simple Equations
    • Advanced Arithmetics
      • 2.1Multiplication and Division
      • 2.2Fractions and Decimals
      • 2.3Basic Algebra
    • Introduction to Geometry
      • 3.1Shapes and Patterns
      • 3.2Introduction to Solid Geometry
      • 3.3Concept of Angles
    • In-depth Geometry
      • 4.1Polygon and Circles
      • 4.2Measurements - Area and Volume
      • 4.3Geometry in the Everyday world
    • Deeper into Numbers
      • 5.1Integers
      • 5.2Ratio and Proportion
      • 5.3Percentages
    • Further into Algebra
      • 6.1Linear Equations
      • 6.2Quadratic Equations
      • 6.3Algebraic Expressions and Applications
    • Elementary Statistics & Probability
      • 7.1Data representation
      • 7.2Simple Probability
      • 7.3Understanding Mean, Median and Mode
    • Advanced Statistics, Probability
      • 8.1Advanced Probability Concepts
      • 8.2Probability Distributions
      • 8.3Advanced Data Analysis
    • Mathematical Logic
      • 9.1Introduction to Mathematical Logic
      • 9.2Sets and Relations
      • 9.3Basic Proofs and Sequences
    • Calculus
      • 10.1Introduction to Limits and Differentiation
      • 10.2Introduction to Integration
      • 10.3Applications of Calculus
    • Calculus
      • 11.1Introduction to Limits and Differentiation
      • 11.2Introduction to Integration
      • 11.3Applications of Calculus
    • Trigonometry I
      • 12.1Basic Trigonometry
      • 12.2Trigonometric Ratios and Transformations
      • 12.3Applications of Trigonometry
    • Trigonometry II & Conclusion
      • 13.1Advanced Trigonometry
      • 13.2Trigonometric Equations
      • 13.3Course conclusion and wrap-up

    Reminder of Fundamentals

    Understanding Basic Arithmetics

    elementary branch of mathematics

    Elementary branch of mathematics.

    Arithmetic is the branch of mathematics that deals with numbers and the basic operations used to manipulate them: addition, subtraction, multiplication, and division. It forms the foundation of almost all fields of mathematics. This unit will provide a refresher on these fundamental concepts.

    The Number System

    The number system is a way to represent and organize numbers. In the most basic sense, we use the decimal number system, also known as base-10. This system uses ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. The position of each digit in a number determines its actual value, also known as its place value.

    Addition and Subtraction

    Addition is the process of combining quantities. The symbol '+' is used to denote addition. For example, in the equation 3 + 2 = 5, 3 and 2 are the quantities being added together, and 5 is the sum.

    Subtraction is the process of taking one quantity away from another. The symbol '-' is used to denote subtraction. For example, in the equation 5 - 2 = 3, 5 is the original quantity, 2 is the quantity being taken away, and 3 is the difference.

    Basic Properties of Numbers

    There are several fundamental properties of numbers that apply to the basic arithmetic operations:

    • Commutative Property: The order in which numbers are added or multiplied does not change the sum or product. For example, 2 + 3 = 3 + 2 and 2 * 3 = 3 * 2.
    • Associative Property: The way in which numbers are grouped in addition or multiplication does not change the sum or product. For example, (2 + 3) + 4 = 2 + (3 + 4) and (2 * 3) * 4 = 2 * (3 * 4).
    • Distributive Property: The product of a number and a sum is equal to the sum of the products of the number and each addend. For example, 2 * (3 + 4) = (2 * 3) + (2 * 4).

    Introduction to Place Value

    Place value is a system for representing numbers where the position of a digit determines its value. In the decimal number system, each position represents a power of 10. For example, in the number 345, the digit 3 is in the hundreds place (10^2), the digit 4 is in the tens place (10^1), and the digit 5 is in the ones place (10^0).

    Understanding basic arithmetic is crucial for grasping more complex mathematical concepts. It forms the foundation upon which all other mathematics is built.

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    Next up: Introduction to Numbers