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Benjamin had 1/2 lb of modeling clay. He used 1/5 ​lb on Monday and another​ 1/4 ​lb on Tuesday. How many pounds of clay does Benjamin have left after Tuesday? Enter your answer in simplest fractional form in the box.

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ToothLin
1/2 = 10/20. 1/5 = 4/20. 1/4 = 5/20.

10/20 - 4/20 = 6/20.
6/20 - 5/20 = 1/20 lbs

Answer: 1/20 pounds

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

  • Modeling clay available: 1/2lb
  • Modeling clay used: 1/5 lb on Tuesday and 1/4 on Tuesday.

So, we have to subtract the amount of clay used (1/5 +1/4) to the amount of clay available (1/2).

Mathematically speaking:

1/2 lb - ( 1/5 lb +1/4 lb) =  

1/2 lb - 9/20 lb = 1/20 lb = 1/20 pounds

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