Question

2:2-3:3-4:4-5:5 равно или больше 39.Нужно расставить скобки.

Answer 1

(2:2)-(3:3)-(4:4)-(5:5)=1-1-1-1=-2    -2<39

Answer 2

To achieve the highest result by adding parentheses to the given expression "2:2-3:3-4:4-5:5", we need to explore the different combinations. It seems like "2:2-3:3-4:4-5:5" represents a series of subtractions. We can place parentheses to group some of the numbers together and perform the subtraction operations more efficiently.

Let's try different combinations:

1. (2:2)-(3:3)-(4:4)-(5:5) = 0 - 0 - 0 - 0 = 0
2. (2:2-3:3)-(4:4-5:5) = 0 - 0 = 0
3. (2:2-3:3-4:4)-5:5 = 0 - 0 - 1 = -1
4. 2:2-(3:3-4:4)-5:5 = 2 - 1 - 1 = 0
5. 2:2-3:3-(4:4-5:5) = 0 - 0 = 0
6. 2:2-(3:3)-(4:4-5:5) = 0 - 0 = 0

Among these combinations, the maximum result is 0 (option 1, option 2, option 5, and option 6). There is no combination that results in a value equal to or greater than 39.

Therefore, with the given expression and the subtraction operations, it is not possible to obtain a result equal to or greater than 39 by placing parentheses.