It makes no difference whether you do subtraction before addition or addition before subtraction. your mistake is that you ignored the minus sign.

3-3×6+2 = 3-18+2

3-18+2 = -15+2 = -13 or

3-18+2 = 3-16 = -13.

-18+2 is -16 not -20 and 3-20 is -17 not 17.

If you don’t make mistakes there is only one correct answer and that is -13.

David

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]]>Did you add your own brackets as I cannot get zero. Note adding brackets in the wrong location will change the equation.

Using Windows Calculator in Standard Mode: 7+7÷7+7×7-7 = 56 because calculated immediately left to right

7+7=14/7=2+7=9*7=63-7=56 This is incorrect.

Using Windows Calculator in Scientific Mode: 7+7÷7+7×7-7 = 50 due to order of operations

Using Search Engine: Both Google and Bing convert to 7+(7÷7)+(7×7)-7 = 50

Adding my own brackets in the wrong locations: (7+7)÷(7+7)×(7-7) = 14÷14×0 = 0, This is incorrect as Order of Operations says Multiplication and Division before Addition and Subtraction.

Regards

David

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]]>0×8=0

Definitely answer is zero

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]]>Please search Order of Operations on the internet or read my articles to learn why you are wrong.

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]]>Thanks for all this, I can’t wait to use them in my developments !

Cheers

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