Problem
Solution
There are many solutions:
1+2+3-4+5+6+78+9 = 100
1+23-4+5+6+78-9 = 100
1+2+34-5+67-8-9 = 100
123+4-5+67-89= 100
123+45-67+8-9 = 100
12+3-4+5+67+8+9 = 100
123-4-5-6-7+8-9 = 100
12-3-4+5-6+7+89 = 100
123-45-67+89 = 100
12+3+4+5-6-7+89 = 100
1+23-4+56+7+8+9 = 100
