279 ; 722 ; 665 ;

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Sorting the numbers means writing them in ascending or descending order. To write them in a certain order we need to compare the numbers between them do determine which number is larger or smaller.

Sorting natual numbers in ascending order means writing the sequence from the smallest to the largest number.

Sorting natual numbers in descending order means writing the sequence from the largest to the smallest number.

6 > 2 > 1

2 < 5 < 9

By learning math, you learn to think.