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Describe the error in the work shown below.

Find an expression equivalent to 18 + 30.
Factors of 18:1,2,3,6,9, 18
Factors of 30:1,2,3,5,6, 10, 15, 30
18 + 30 = 6(3 + 10)
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It needs to be 1,2,3,4,5,6,15,39,35
User Swooth
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