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Compare how you would model and record finding the sum and difference of two rocks weighing 2/8 & 3/8 of a pound

Respuesta :

Sum  = 2/8 + 3/8  = (2+3)/8  = 5/8 pounds

Difference =  3/8 - 2/8  = (3-2)/8 = 1/8 pounds 

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