Identify the missing addend in 3.58n+____= 0

Explain how you determined your answer.

2 answers

You have to add two addends that are equal in size, but opposite in sign.

Example 2 + -2 = 0

x + - x = 0

Can you figure it out now?
Yes, so when i explain how i determine my answer i would say "the addend would have to be a negative of the positive addend to equal 0" right?