The answer is 30,987,651,774 The best way to to add the last three digits(265) to 509=774 Which is 30,987,651,774
The sum of 509 + 30 , 987 , 651 , 265 is 30 , 987 , 651 , 774 . To find the sum, you align the numbers and add them from the rightmost digits. The addition results in 30 , 987 , 651 , 774 .
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