Answer :

gavin916
987,654,321 would be the greatest WHOLE number using the digits 1-9 only once i assume
calculista

we know that

The way to form the greatest number is to use the highest valued digit in the most significant digit.

so

[tex] 900,000,000+80,000,000+7,000,000+600,000+50,000+4,000+300+20+1=987,654,321 [/tex]

therefore


the answer is

The greatest whole number that uses all the digits from 1 to 9 only at once is

[tex] 987,654,321 [/tex]

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