need help on a step by step approach to doing these and similar

http://img179.imageshack.us/img179/548/sum.jpgi can do the basic ones but when they add fractions etc i get lost

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- Sep 9th 2009, 12:44 AMrealisticsimplify
need help on a step by step approach to doing these and similar

http://img179.imageshack.us/img179/548/sum.jpgi can do the basic ones but when they add fractions etc i get lost - Sep 9th 2009, 12:48 AMmathaddict
- Sep 9th 2009, 01:07 AMrealistic
- Sep 9th 2009, 04:49 AMmathaddict