What are numerical expressions ??? And expressions with variables ??? Tell me, silly ..

What are numerical expressions ??? And expressions with variables ??? Tell me, silly ..

  1. Numerical expressions contain only numbers and mathematical signs of actions are common examples. The example itself is a numeric expression, and its response is called the value of a numeric expression. For example:
    (25 - 15): 4 = 2,5
    Expressions with variables contain numbers, letters (variables), and mathematical signs of actions. For example, the literal expression:
    2x + 7, or 5 / x, or 4 - y / 5 ....
    In such expressions one can not find one answer as in numerical (for examples).
    If the value is given by a change (a letter), then you can find the value of the expression with the variable. For example:
    If x = 10, then 2x + 7 = 2 * 10 + 7 = 27
  2. numeric, those that consist of numbers of action identities (2 + 15; 6: 3 ....)
    alphabetic-if there are letters (5, 7x: y ....)
  3. Numerical expressions contain only numbers and mathematical signs of actions are common examples. The example itself is a numeric expression, and its response is called the value of a numeric expression. For example:
    (25 - 15): 4 = 2,5
    Expressions with variables contain numbers, letters (variables), and mathematical signs of actions. For example, the literal expression:
    2x + 7, or 5 / x, or 4 - y / 5 ....
    In such expressions one can not find one answer as in numerical (for examples).
    If the value is given by a change (a letter), then you can find the value of the expression with the variable. For example:
    If x = 10, then 2x + 7 = 2 * 10 + 7 = 27
  4. Numerical expressions contain only numbers and mathematical signs of actions are common examples. The example itself is a numeric expression, and its response is called the value of a numeric expression. For example:
    (25 - 15): 4 = 2,5
    Expressions with variables contain numbers, letters (variables), and mathematical signs of actions. For example, the literal expression:
    2x + 7, or 5 / x, or 4 - y / 5 ....
    In such expressions one can not find one answer as in numerical (for examples).
    If the value is given by a change (a letter), then you can find the value of the expression with the variable.


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