DO NOT USE A CALCULATOR! PreC Ex1 prb 4.JPG 

   DO NOT USE A CALCULATOR!PreC Ex1 prb 12.JPG    

   DO NOT USE A CALCULATOR! PreC Ex1 prb 6.JPG 

PreC Ex1 prb 21 EXTRA CR.JPG 

   NO NEED TO USE A CALCULATOR! PreC Ex1 prb 20.JPG 

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   DO NOT USE A CALCULATOR!PreC Ex1 prb 3.JPG 

   DO NOT USE A CALCULATOR! PreC Ex1 prb 1.JPG 

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