Nicky is trading baseball cards with Jill. If Nicky trades two cards worth $8 each for 1 card worth $21, how many dollars of profit does he make?
Let's be accurate as possible. Think before you answer.
5
First find the total cost of the two $8 cards: $8 / card * 2 cards = $16.

Then subtract the cost of the cards Nicky gave away from the cost of the card he received to find his profit: $21 - $16 = $5.

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The answer: 5