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Автор - элас

ребят, решите плиз примеры..
1. -3,8-(-8,1+3,9)=?
2. 7,5=(-8,4-2,1)=?
3. -8, 76-(--3,25-10,76)=?
4. -6,19+(-1,5+5,19)=?

Ответ

Автор - Корпарэйшен
-3,8=+3,8=3,8   делаем в скобках  8,1+3,9=12
8,4-2,1=6,3 значит 7,5 больше 6,3 неправильно
3,25-10,76 не может быть
1,5+5,19=6,24 + 6,19=12,43

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