2006 AMC 8 第 1 题

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所有题目均经美国数学协会(MAA)官方合法授权使用。

1.

Mindy 买了三样东西,价格分别是 $1.98\$1.98$5.04\$5.04$9.89\$9.89。她的总花费四舍五入到最接近的美元是多少?

Mindy made three purchases for $1.98\$1.98, $5.04\$5.04, and $9.89\$9.89. What was her total, to the nearest dollar?

$10\$10

$15\$15

$16\$16

$17\$17

$18\$18

答案:D
知识点:估算钱币
难度评级:370
解答:

这些数都接近整数美元,可以把价格四舍五入后相加。

这些价格分别约为 $2\$ 2$5\$ 5$10\$ 10,总和为 $17\$ 17

所以正确答案是 D

Since all the values are already close to a whole number, we can just add the sums of the rounded numbers.

These prices round to $2,\$ 2, $5,\$ 5, and $10,\$ 10, which add to $17.\$ 17.

Thus, D is the correct answer.

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