36,204+40,918 estimate then find the sum

Estimated guess 77,000 actual sum 36,204 + 40,918 = 77,112

First you need to round the numbers:

36,204 = 36,000
40,918 = 41,000

Now that the numbers are rounded it is easy to add them:

36,000 + 41,000 = 77,000

Hope this helps :)

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