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I'm hoping somebody can help me. I have to evaluate the following expression using BIDMAS rules without using a calculator: 1-2/3^{2}

I can get as far as 1-2/9 but the answer is 7/9. I don't understand how to get from 1-2/9 to 7/9 in my head. For instance 2/9 = 0.2 recurring, but 1-0.22222222222 etc doesn't give me 7/9.

Help me! :)

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# Homework Help: BIDMAS Evaluating Expression Without Calculator

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