DAY 444

IT ALL ADDS UP
Credit: GAMES Magazine
March, 2013
Henry Dudeney

An old challenge is to get the numbers 1 through 9, in order, to form an expression that equals 100, using only basic arithmetic operations (+, -, x, div.) and parentheses. For example,

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

Can you find another solution that uses just three steps and no parentheses?

HINT:
#1: Only addition and subtraction are used.

Answer:

123 - 45 -67 + 89 = 100