6th Grade Math

My Question: When Im doing multiplication, do i check it by using 2?
For example:
84 times 37 = 3,078

How do i check my answer using estimation?
-
Answer: Im sorry, but i really need help on this question, I'm kinda stuck

asked by Patricia
  1. I checked it by running it through my calculator two times.

    Both times the answer was 3,108

    posted by Ms. Sue

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