28×52≈（）
A. 1500
B. 1800
C. 2000

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Worked solution

1. 将因数通过四舍五入法估算为最接近的整十数

根据乘数估算的方法，将 $28$ 看作最接近的整十数 $30$ ；将 $52$ 看作最接近的整十数 $50$ 。

2. 计算估算后的乘积并选择正确选项

进行整十数相乘的口算：
$30 \times 50 = 1500$
因此， $28 \times 52 \approx 1500$ 。对照选项，可知应选 A。

Answer

AI analysis — may contain mistakes.

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