简便计算0.25*7.9*0.5
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 01:27:15
![简便计算0.25*7.9*0.5](/uploads/image/z/270631-55-1.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%970.25%2A7.9%2A0.5)
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简便计算0.25*7.9*0.5
简便计算0.25*7.9*0.5
简便计算0.25*7.9*0.5
0.25*0.5*8-0.25*0.5*0.1=1-0.125=0.875
0.25*7.9*0.5
=1/4*(8-1/10)*1/2
=1/8*(8-1/10)
=1-1/80
=79/80