Count your Brain- Part 1

In this part we deal with number puzzles. You can quickly find answers to some puzzles & may be take few more minutes to solve the rest. Correct answers given at the end in decreasing order. Some puzzles may have more than one answer but I give only one answer. If you get more than one just give a comment of it which will be viewable to all.
1. Seven Digits
Writethe 7 digits from 1 to 7 one after another and connect them with plus and minus signs to get 40.
2. Get 55
Wite the 7 digits from 1 to 7 one after another and connect them with plus & minus to get 55
3. Nine Digits
Write the 9 digits from 1 to 9 one after another and connect them with plus and minus signs to get 100
4.All the 10 digits
Obtain 100 using all the ten digits. You can use the digits in any order you want.
5. Get one
Obtain one using all ten digits
6. Five Twos
Obtain 11 using five twos. All the basic mathematical operations can be used.
7. Four Twos
Get 111 using four twos
8. Get a Hundred
Get a hundred using five ones.
9. Five Threes
Obtain 100 using five threes
10. Five Nines
Get 10 using five nines

Answer
10. 9 + 99/99=10
9. 33*3 + 3/3=100
8. 111-11=100
7. 222/2=111
6.2/2 + 2-2=11
5. 148/296 + 35/70=1
4. 50 1/2 + 49 38/76=100
3. 123+4-5+67-89=100
2. 12-3+45-6+7=55
1. 12+34-5+6-7=40