A numerical expression uses numbers and operations. It also has an equal sign.
An algebraic expression uses variables and operations. Unlike a numerical expression it does not have an equal sign.
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Numerical: numbers only such as 10 + 2 = 12, or 14/7.
Algebraic: primarily symbolic but may include numerical values or constants.
E.g. y = x3 + x2 + x + C. A = T(1 + dt).
Numerical Expression: 1.) 20+2-8 ( Or any other number with two symbols on math ) Algebraic Expression: 2.) h x 2 ( Or any other number using only one symbol an a letter ) The difference between a numerical and algebraic expressions is that numerical expressions use only numbers, but algebraic expressions use letters as variables to represent numbers.
Simplifying an expression is getting rid of any brackets or parentheses, performing as many operations as you can - including combining like terms. To evaluate an expression you would substitute the numerical values of all the variables, carry out all the operations (addition, multiplication etc) in the expression to reach the answer - the numerical value of the expression.
An expression is used in algebraic expressions meaning (890.098)+755,634 and a equality is a term meaning equal in both ways.
Numerical data is numbers. Non-numerical data is anything else.
An algebraic expression will normally include one or more variables that is represented by a letter or some non-numeric symbol.