1、原式=9999*7778+9999*2222=9999*10000=99990000 2、原式=69.32*5.6+69.32*0.1+69.32*4.3=69.32*10=693.2
9999乘以7778加上3333乘以6666怎么简便计算?5.6乘以69.32加上138.64乘以0.05加上693.2
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简算:(1)9999*7778+3333*6666(2)5.6*69.32+138.64*0.05+693.2*0.4300
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