Lost??

[azajewel]

-45 + 0 + 45 illustrated the
a. distributive property
b. identity element of addition
c. substitution property
d. closure property of addition and multiplication

 

[Denis]

Post the WHOLE problem please.

 

[azajewel]

that is the whole problem, but the word illustrated should be "illustrates."

 

[mmm4444bot]

-45 + 0 + 45 Perhaps, your materials contain typographical errors.

Since you've proofread your typing and double-checked your materials, I can only offer the following comments.

-45 + 0 + 45 is called an expression.

All expressions represent numerical value. The value of your expression is zero.

IF your materials were to present instead: -45 + 0 = -45, then the answer would be (b).

The identity element of addition tells us that adding zero to any value changes nothing (other than the fact that you just wasted another perfectly good zero :wink: ).

The answer cannot possibly be (a). You know that already, yes?

The answer cannot possibly be (c). You understand this definition, too, yes?

The answer cannot possibly be (d). And you know because you looked up the meaning, yes?

Therefore, say (b) or skip this exercise.

Otherwise, do you have a specific question? Your posted question "Lost?" implies that you have some specific questions about this exercise. What are they?