AMC 8 1988 Problem 2

AMC8 1988 年第 2 题

表达式与运算★☆☆☆☆
The product 8×0.25×2×0.125=8\times 0.25\times 2\times 0.125 =
乘积 8×0.25×2×0.125=8\times 0.25\times 2\times 0.125 =
  1. A.18\frac18
  2. B.14\frac14
  3. C.12\frac12
  4. D.1
  5. E.2

正确答案 · Correct Answer

C

解析 · Solution

Solution 1

Converting decimals to fractions yields 8×.25×2×.125=81×14×21×18=1632=12\displaystyle 8 \times.25×2 \times.125 = \frac{8}{1} \times \frac{1}{4} \times \frac{2}{1} \times \frac{1}{8} = \frac{16}{32} = \frac{1}{2}.

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