найдите сумму:
1) (9-0,9)+(8-0,8)+(7-0,7)+(6-0,6)+(5-0,5)+(4-0,4)=?
2) (5,12-4,21)+(6,23-4,23)+(7,34-4,43)+(6,45-2,54)+(5,56-0,65)=?
непомню
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