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

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

- 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 - numeric, those that consist of numbers of action identities (2 + 15; 6: 3 ....)

alphabetic-if there are letters (5, 7x: y ....) - 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 - 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.