5 () 5 () 5 () 5 () 5 = 1. Fill in the operation symbol in the bracket (bracket can be added) There are several more questions: 5 5 5 5 5=2 5 5 5 5 5=3 5 5 5 5 5=4

5 () 5 () 5 () 5 () 5 = 1. Fill in the operation symbol in the bracket (bracket can be added) There are several more questions: 5 5 5 5 5=2 5 5 5 5 5=3 5 5 5 5 5=4

（5+5）/5 -5 /5=1
（5 +5）/5 *5 /5=2
（5 +5）/5 +5 /5=3
（5 +5+5 +5） /5=4

Add a positive or negative sign in front of the numbers 3, 4, 5, 6, 7, 8, 9, so that their sum is "- 10". Please come up with as many schemes as you can
That's it. Please help me. I really can't do orz. I can do it. I don't have time to do it. I want to sleep. If QAQ is good, I will add points, really

3+4-5-6-7-8+9
3-4-5+6+7-8-9
-3+4+5-6+7-8-9
-3-4-5-6+7-8+9
Conclusion:
Select the sum of 16 to take positive, the rest to take negative, you can meet the requirements!

Add positive or negative signs before the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 to make their sum - 13. Please think of as many schemes as you can

1 + 2 + 3 + - - + 9 = 45 (45-13) / 2 = 1616-29 = - 13, thus 9 + 7-1-2-3-4-5-6-8 = - 139 + 6 + 1-2-3-4-5-7-8 = - 139 + 5 + 2-1-3-4-6-7-8 = - 139 + 4 + 3-1-2-5-6-7-8 = - 139 + 4 + 2 + 1-3-5-6-7-8 = - 138 + 7 + 1-2-3-4-5-6-9 = - 138 + 6 + 2-1-3-4-5-7-9 = - 138 + 5 + 3-1 -