How many numbers between 11 and 111 are multiples of both 2 and 5?

Question

1 2 3 4 5 6 7 8 9 = 100
Challenge:
Place + and - math symbols between the numbers above to make the equation true.
Use + and - a total of three times.
Do not rearrange the numbers.

Answer 1

20, 30, 40, 50, 60, 70, 80, 90, 100, 110- total 10 numbers