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
А)219+(589-130)=678
1) 589-130=459
2) 219+459=678
Б)678+98-517=259
1)678+98=776
2)776-517=259
В) 900-(859-214)=255
1) 859-214=645
2)900-645=255
Г)(800-218)+(326+92)=1000
1)800-218=582
2)326+92=418
3)582+418=1000
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Answers & Comments
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
А)219+(589-130)=678
1) 589-130=459
2) 219+459=678
Б)678+98-517=259
1)678+98=776
2)776-517=259
В) 900-(859-214)=255
1) 859-214=645
2)900-645=255
Г)(800-218)+(326+92)=1000
1)800-218=582
2)326+92=418
3)582+418=1000