What is missing (1000)

What number is to add to get 1000?

Result

602:  398
278:  722
696:  304
617:  383
569:  431
251:  749
897:  103
395:  605
62:  938
335:  665

Solution:

Solution in text 602:=
Solution in text 278:=
Solution in text 696:=
Solution in text 617:=
Solution in text 569:=
Solution in text 251:=
Solution in text 897:=
Solution in text 395:=
Solution in text 62:=
Solution in text 335:=







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