A while ago we had a puzzle about making the digits 1 to 9 add up to 100, which you can see here. We have another similar puzzle for you.
Retaining the order of the digits 1 to 9, although you can combine them, and using only addition and subtraction, how many ways can you make 100.
For example 12 + 34 - 56 + 78 - 9 = 59 is valid, but doesn't equal 100!
Here are a few . . .
1 + 2 + 34 − 5 + 67 − 8 + 9 = 100
12 + 3 − 4 + 5 + 67 + 8 + 9 = 100
123 – 4 – 5 – 6 – 7 + 8 – 9 = 100
123 + 4 – 5 + 67 – 89 = 100
123 + 45 – 67 + 8 – 9 = 100
123 – 45 – 67 + 89 = 100