792. Используя свойства вычитания, вычислите рациональным способом:
1) 12.918 (4,918 + 3,4):
3) (13,245 + 9.88) - 6.88;
2) (6.403 + 8.715) 2,403,
4) 11.703 - (5.4 +2,703).
Можете в столбик пж​
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