Ответ:
1. 2 + 6 - 7 = (2 + 6 - 7) = 1
2. 2 + 3 + 3 = 5 + 3
3. 9 + - = 3 + 5 - 6 = 2
4. + - = 4 + 3 - 5 = 2
5. 3 + 0,5 - 2 + 0,01 = 6 + 3 - 8 + 0,1 = 2 + 3,1
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Ответ:
1. 2
+ 6
- 7
= (2 + 6 - 7)
= 1
2. 2
+ 3
+ 3
= 5
+ 3
3. 9
+ 
- 
= 3
+ 5
- 6
= 2
4.
+ 
- 
= 4
+ 3
- 5
= 2
5. 3
+ 0,5
- 2
+ 0,01
= 6
+ 3
- 8
+ 0,1
= 2
+ 3,1