AlgebraEasyMoney left after a purchase
Algebra practice question
Dan had $40. After buying a book he had $25 left. How many dollars did the book cost?
Answer: 15
40 − b = 25 gives b = 15.
Common wrong answers
- If you answered 5
- 5 is a subtraction slip.
- If you answered 25
- 25 is the money left.
- If you answered 65
- 65 adds the two amounts.
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