Answer:

Step-by-step explanation:
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Answer:
addition property
Step-by-step explanation:
See attached image.
"color the piece according to your color chart." Do you have that? If you don't, I wouldn't worry, you still did all the work and got all the answers, so your teacher should be fine with it.
You haven't shared the list of expressions from which you are to choose an answer.
However: you can perform this estimation yourself as follows:
Round off both -21.87 and 4.79. -21.87 goes to -22 and 4.79 to 5. Then
a good estimate of -21.87 divided by 4.79 would be -22/5, or -4.4.