The sum of 3,000,000,000,000,000,000 and 678,789,278,973,927 is 3,000,678,789,278,973,927. This is obtained by adding the numbers in the corresponding place values: starting from the right, adding the ones, tens, hundreds, thousands, etc. until the quadrillion place. The result is a very large number due to the significant digits in both addends.
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How do you say 3,000,000,000,000,000,000
The answer is 672.
That is 27 x 9 = 243
189
A plus + a plus is a plus.