Tony buys a CD that is priced at $13.59. He has a coupon for $1.85 off. He pays with a $20 bill. Which is the best whole number estimate of how much change he gets?

Subtract the $1.85 coupon from the $13.59 price: $13.59 − $1.85 = $11.74. Then subtract the cost from $20: $20 − $11.74 = $8.26. Rounded to the nearest whole dollar, the change is about $8, so the best estimate is choice A, $8.

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