Answer:
-10
Step-by-step explanation:
When you are estimating, you round.
You can round -7.94 to -8
You can round -2.31 to -2
So you have now rounded the problem to:
-8-2
The answer would be -10.
So, -10 would be a good estimate for that problem.
You can check your answer by doing the actual problem.
-7.94 - 2.31
That equals -10.25
-10.25 rounds down to -10, so, yes, -10 would be a good estimate.
