The sequence of non zero numbers, 123456789 and 987654321 can be separated by a plus or minus so that the result of the described arithmetic operation will be 100
for example
1 + 2 + 34 - 5 + 67 - 8 + 9 = 100
or
98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100
There are 11 solutions for 123456789 and 15 solutions for 987654321
Here is the puzzle, see if you can make the correct coordinates with them
12 - ? - 4 + 5 - 6 + ? + 89 = 100
1 + 2? - 4 + 56 + ? + 8 + 9 = 100
1 + 2? - 4 + 5 + 6 + ?8 - 9 = 100
12 + ? - 4 + 5 + 6? + 8 + 9 = 100
1 + 2 + ? - 4 + 5 + 6 + ?8 + 9 = 100
and the other way
9 + 8 + 76 + 5 + 4 - 3 + ? - ? = 100
98 - 7 - 6 - 5 - 4 + 3 + ?? = 100
9 + 8 + 76 + 5 - 4 + 3 + ? + ? = 100
98 + 7 - 6 + 5 - 4 - 3 + ? + ? = 100
98 - 7 - 6 + 5 + 4 + 3 + ? + ? = 100
You can validate your puzzle solution with certitude.