Altered State

Consider the following false equation:

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 100

The task is to make this a correct equation by altering the “punctuation” on the left side.

Only addition and subtraction signs may be used, but the spacing between the digits can be altered to make larger numbers.

Here is one solution:

123 – 45 – 67 + 89 = 100

Find as many other solutions as you can.

Source: Garder, M. (1978). Aha! New York: W.H. Freeman and Company.