*代表乘号 /代表除号

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/20 19:14:36

*代表乘号 /代表除号
1 3.14*70.1-0.314+314*0.3
2 1.25*67.875+1250.7875+1250*0.053375
3 0.125*2.5*64*0.5
4 6.25*8.72*16+3.75*0.827*8

1 3.14*70.1-0.314+314*0.3
=0.314*10*70.1-0.314+0.314*1000*0.3
=0.314*701-0.314*+0.314*300
=0.314*(701-1+300)
=0.314*1000
=314
2 1.25*67.875+125*0.7875+1250*0.053375
=1.25*67.875+1.25*100*0.7875+1.25*1000*0.053375
=1.25*67.875+1.25*78.75+1.25*53.375
=1.25*(67.875+78.75+53.375)
=1.25*200
=250
3 0.125*2.5*64*0.5
=0.125*2.5*(8*4*2)*0.5
=(0.125*8)*(2.5*4)*(2*0.5)
=1*10*1
=10
4 6.25*8.72*16+3.75*0.827*8
这个错了
应该是
6.25*0.872*16+3.75*8.72*8
=6.25*0.872*(8*2)+3.75*0.872*10*8
=(6.25*2)*0.872*8+(3.75*10)*0.872*8
=12.5*0.872*8+37.5*0.872*8
=(12.5+37.5)*0.872*8
=50*8*0.872
=400*0.872
=348.8

（注意：请说出理由,）（可将*代表乘号,/代表除号.）是两个简便计算：（*代表乘号,/代表除号） 9999*2222+3333*3334 999*999+1999 计算题. /代表分数线 *代表乘号圈中加个乘号代表什么意思 *是乘号还是除号? *是乘号是除号?/是乘号是除号? 除号和乘号怎么打怎样打除号和乘号减号乘号除号怎么打乘号怎么打?还有除号乘号、除号、分数线怎么打 20.09*48-200.9*1.4+2009*0.66[简便计算,*代表乘号】