作业帮急0.72*0.58+0.28*0.38=?简便计算
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/25 16:04:11
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急0.72*0.58+0.28*0.38=?简便计算
急0.72*0.58+0.28*0.38=?简便计算
急0.72*0.58+0.28*0.38=?简便计算
0.72*0.58+0.28*0.38
=(1-0.28)*0.58+0.28*0.38
=0.58-0.28*0.58+0.28*0.38
=0.58-0.28*(0.58-0.38)
=0.58-0.28*0.2
=0.58-0.056
=0.524
0.72*0.58+0.28*0.38
=(1-0.28)*0.58+0.28*0.38
=0.58-0.28*0.58+0.28*0.38
=0.58-0.28*0.2
=0.58-0.56
=0.02