AMC8 1993

AMC8 1993 · Q4

AMC8 1993 · Q4. It mainly tests Exponents & radicals, Decimals.

1000 × 1993 × 0.1993 × 10 =

(A) 1.993 × 10³ 1.993 × 10³

(B) 1993.1993 1993.1993

(D) 1,993,001.993 1,993,001.993

(E) (1993)² (1993)²

Answer

Correct choice: (E)

正确答案：（E）

Solution

Answer (E): $1000 \times 1993 \times 0.1993 \times 10 = ((1000 \times 10) \times 0.1993) \times 1993$ $= (10{,}000 \times 0.1993) \times 1993$ $= 1993 \times 1993 = (1993)^2.$

答案（E）： $1000 \times 1993 \times 0.1993 \times 10 = ((1000 \times 10) \times 0.1993) \times 1993$ $= (10{,}000 \times 0.1993) \times 1993$ $= 1993 \times 1993 = (1993)^2.$

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