Answer:

-23 - 3

The first minus sign is "negation" and the second minus sign is "subtraction". The spaces in the expression emphasize the different roles, but are not necessary. The following expression is equivalent:

-23-3

Practice

Examine the following expressions. Assume that each variable has already been correctly declared. Decide if the expression is correct, then click on the button.

Expression	Correct or Not Correct?	Expression	Corrector Not Correct?
25		25 - value
2( a - b )		(a-b) * (c-d)
A - b/c + D		-sum + partial
( (x+y) / z ) / ( a - b )		( (m - n) + (w-x-z) / (p % q )

QUESTION 3:

Are arithmetic expressions the only kind of expression?