Предмет: Математика, автор: nastena200000

раскойте скобки и найдите значение выражения 8,7+(13,7-15,2)-(24,6-20,1)

Ответы

Автор ответа: KpoPro

8,7+(13,7-15,2)-(24,6-20,1)= 8,7+13,7-15,2-24,6+20,1= 22,4-39,8+20,1=42,4-39,8=2,6

Автор ответа: Аноним

8,7 +(13,7-15,2) -(24,6-20,1) = 8,7 + 13,7- 15,2- 24,6+ 20,1 = 2,7

Проверка:

1) 13,7 -15,2 =-1,5

2) 24,6 -20,1 =4,5

3)8,7 +(-1,5) = 7,2

4)7,2 -4,5 =2,7

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