Posted by **david** on Sunday, February 21, 2010 at 4:34pm.

Without finding the exact answer, select which of the following numbers is the best estimate of each sum or difference and justify your choices: -2/3, 0, 2/2/3.

a. 1/9 + 2/5 – 1/3 – 3/4

I am confused on where to begin on this question.

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