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Questions and Answers

What is the definition of addition?

  • Combining two or more numbers to get a total or a sum. (correct)
  • Finding the difference between two numbers.
  • Multiplying two or more numbers to get a product.
  • Dividing a number into two or more parts.

    • What symbol is used to represent addition?

  • ÷
  • -
  • ×
  • + (correct)

    • Which property does not apply to subtraction?

  • Commutative Property
  • Associative Property
  • Distributive Property
  • All of the above (correct)

    • What is the result of the equation 2 + (3 + 4)?

    <p>10</p> Signup and view all the answers

    What is the definition of subtraction?

    <p>Finding the difference between two numbers.</p> Signup and view all the answers

    Which of the following equations is true?

    <p>2 + 3 = 3 + 2</p> Signup and view all the answers

    Study Notes

    Numbers and Operations

    Addition

    • Definition: Combining two or more numbers to get a total or a sum.
    • Symbol: + (plus sign)
    • Example: 2 + 3 = 5
    • Properties:
      • Commutative Property: The order of numbers being added does not change the result. (e.g., 2 + 3 = 3 + 2)
      • Associative Property: The order in which numbers are added does not change the result. (e.g., (2 + 3) + 4 = 2 + (3 + 4))
      • Distributive Property: Addition can be distributed over multiple numbers. (e.g., 2 + (3 + 4) = 2 + 3 + 4)

    Subtraction

    • Definition: Finding the difference between two numbers.
    • Symbol: - (minus sign)
    • Example: 5 - 2 = 3
    • Properties:
      • Not Commutative: The order of numbers being subtracted changes the result. (e.g., 5 - 2 ≠ 2 - 5)
      • Not Associative: The order in which numbers are subtracted changes the result. (e.g., (5 - 2) - 1 ≠ 5 - (2 - 1))
      • No Distributive Property: Subtraction cannot be distributed over multiple numbers.

    数和运算

    加法

    • 加法的定义：将两个或多个数结合以获取总和或和。
    • 加法符号：+ (加号)
    • 示例：2 + 3 = 5
    • 加法属性：
      • 交换律：加法的顺序不改变结果。例如：2 + 3 = 3 + 2
      • 结合律：加法的顺序不改变结果。例如：(2 + 3) + 4 = 2 + (3 + 4)
      • 分配律：加法可以分布在多个数上。例如：2 + (3 + 4) = 2 + 3 + 4

    减法

    • 减法的定义：找到两个数之间的差。
    • 减法符号：- (减号)
    • 示例：5 - 2 = 3
    • 减法属性：
      • 非交换律：减法的顺序改变结果。例如：5 - 2 ≠ 2 - 5
      • 非结合律：减法的顺序改变结果。例如：(5 - 2) - 1 ≠ 5 - (2 - 1)
      • 无分配律：减法无法分布在多个数上。

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