Mental Floss

Brain Game: Math Friday

By BY
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This is either late for Math Monday, or early for Math Monday. I'll let you decide which. Good luck!

Using exactly FIVE plus signs and ONE minus sign, make the following calculation work: 1  2  3  4  5  6  7  8  9 = 100

Here are two SOLUTIONS.

SOLUTIONS:

I know of two. If you find another solution that meets the rules, please post it in the comments. Thanks! 

1 + 23 - 4 + 56 + 7 + 8 + 9 = 100

12 + 3 - 4 + 5 + 67 + 8 + 9 = 100

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