Yesterday, Aldo had 113 baseball cards. Today, he gave c away. Using c, write an expression for the number of cards Aldo has left.
Understand the Problem
The question asks for an algebraic expression to represent the number of baseball cards Aldo has left after giving away 'c' cards from an initial total of 113.
Answer
The expression is $113 - c$.
Answer for screen readers
The expression for the number of baseball cards Aldo has left is $113 - c$.
Steps to Solve
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Identify the initial number of baseball cards Aldo starts with a total of 113 baseball cards.
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Determine the number of cards given away Aldo gives away $c$ baseball cards.
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Formulate the expression for cards left To find the number of cards left, subtract the number of cards given away from the initial total:
$$ \text{Number of cards left} = 113 - c $$
The expression for the number of baseball cards Aldo has left is $113 - c$.
More Information
This expression represents the relationship between the initial number of cards Aldo has and how many he has given away. It can be used to quickly determine how many cards remain after giving away various amounts.
Tips
- Forgetting to subtract $c$ from the total may lead to incorrect expressions, such as simply restating the initial number of cards.
- Not understanding that $c$ can represent any quantity of cards given away, which might lead to confusion in substituting values.
