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用简便方法计算
23×25+76×25+25             
999×222+333×334.
人气:230 ℃ 时间:2019-12-18 09:30:34
解答
①23×25+76×25+25  
=25×(23+76+1)
=25×100
=2500
           
②999×222+333×334
=333×666+333×334
=333×(666+334)
=333×1000
=333000
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