To solve \(9 + 9 + 28 + 42 + 28\):
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First, add the first two numbers: \(9 + 9 = 18\)
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Next, add the result to the third number: \(18 + 28 = 46\)
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Now, add the result to the fourth number: \(46 + 42 = 88\)
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Finally, add the last number: \(88 + 28 = 116\)
So, \(9 + 9 + 28 + 42 + 28 = 116\).