Anything that can be evaluated (calculated) as a number. For example, assuming that "x" and "y" stand for numbers:
3
3 + 1
x + 5
x2
x + 7
square root of (x2 + y2)
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This is ex. Of numerical expression 5-5, 5/5 5+5, 5*5
A numerical expression is a mathematical phrase involving only numbers and one or more operational symbols. The following are some examples of numerical expressions. For example, the numerical expression 4 + 20 - 7 in the example above simplifies to the number 17.
5.8 is a numerical expression.
(four times ten)less twenty
A Numerical Expression is an expression only using numbers.