6th Grade Math

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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?
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Answer: Im sorry, but i really need help on this question, I'm kinda stuck

  • 6th Grade Math -

    I checked it by running it through my calculator two times.

    Both times the answer was 3,108

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