How do you estimate 387 plus 945 plus 1024?

Answer 1

To estimate a number you round it up to easier number so 387 would be 400. 945 would be 950 and 1024 would be 1030.

so 400 and 950 would be 1350 plus 1030 equals 2380

you could even round it up easier so 400 plus 900 and 1000 equals 2300