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[(4x8)x25%8]x125的简便方法

[(4x8)x25-8]x125 =4×8×25×125-8×125 =4×25×8×125-8×125 =100×1000-1000 =100000-1000 =99000

分配律(4十8)X25 解:原式=4x25+8x25 =100+200 =300

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