Is 3 plus 7 a numerical expression?

Answer 1

Yes. Anything which you can evaluate (calculate) to get a number is a numerical expression. Thus, all of the following are numerical expressions:5

x (if the variable stands for a number)

1 + 2

5 / 3

square root of (5 / 3)

In general:

* Any number

* Any variable that stands for a number

* An addition, subtraction, multiplication, division, or power that involves numerical expressions is again a numerical expression (as long as the operation makes sense - for example, you can't divide by zero)

* Many mathematical functions, with a numerical expression as a parameter - for example, sin(5 + 3), ln(10), etc.

Answer 2

yes