# 123456789=1 problem

Insert multiplication and division operators and parentheses into the following sequence to make the equation true.

Note that you can combine digits to form numbers, such as 1 and 2 to make 12, or 4 and 5 to make 45, but you can't alter the order of the sequence.

1 2 3 4 5 6 7 8 9 = 1

• Doesn't seem to be a duplicate - this requires only multiplication and division, the other allowed any operators. Note that it's super easy with +/- : 1-2+3+4-5-6+7+8-9 = 1 – jhabbott Feb 12 '16 at 23:17

$$12 \times (3/4)/56 \times 7 \times 8/9 = 1$$

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

So, how did I misinterpret the puzzle?

• It asked for multiplication and division, not addition and subtraction. – f'' Feb 14 '16 at 2:34
• Man am I stupid for not really reading that. My mind just read multiplication and division, and just assumed addition and subtraction were ok too. – Larry Troxler Feb 14 '16 at 3:23