1÷9(3 (3))-(-1)+2 solve it
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Answer:
This is problem is a good example of where the use of parentheses would make things clearer.
Division has higher priority than addition or subtraction, so you divide first.
But ÷ and / both mean division. Or do they? If 1/3 is just a number, then
9 - 3 ÷ 1/3 + 1 = 9 - (3 ÷ 1/3) + 1 = 9 - (3 x 3) + 1 = 9 - 9 + 1 = 1
But, if 1/3 actually means 1 divided by 3, then there are two consecutive divisions without parentheses, and in that case you are supposed to work left to right:
9 - 3 ÷ 1/3 + 1 = 9 - 3 ÷ 1 ÷ 3 + 1 = 9 - (3 ÷ 1) ÷ 3 + 1 = 9 - 3 ÷ 3 + 1 = 9 - 1 + 1 = 9.
So which is it? Well it clearly depends on whether you interpret 1/3 as a number or as 1 divided by 3. And, it raises the question: do ÷ and / really mean the same thing?
Why not avoid all confusion and just write9 - (3 ÷ 1/3) + 1 or 9 - (3 ÷ 1)/3 + 1 ?
That way there is no ambiguity and everyone will get the same answer.
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· Answer requested by Daniel Noor
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