How do you estimate the sum of 403,446 and 396,755?

403446 is around 400000 so you round that up in your head. 396755 is close to 400000 so you round that up in your head to. Then you add them together to get 800000, which you can do in your head.

Answered by ZackFry | 2024-06-10

you round both numbers to 1 significant figure. So you do 400,000 + 400,000 = 800,000

Answered by elwira123 | 2024-06-10

To estimate the sum of 403,446 and 396,755, round each number to the nearest hundred thousand: 403,446 rounds to 400,000 and 396,755 also rounds to 400,000. Adding these rounded numbers gives an estimated sum of 800,000.
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Answered by ZackFry | 2024-12-26