а)219+(589-130)=219+459=678
б)(678+98)-517=776-517=259
в)900-(859-214)=900-645=255
г)(800-218)+(326+92)=582+418=1.000
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а)219+(589-130)=219+459=678
б)(678+98)-517=776-517=259
в)900-(859-214)=900-645=255
г)(800-218)+(326+92)=582+418=1.000