0.325*0.8+0.55/5/4-3/5/8/7=?(简算)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 01:26:38
![0.325*0.8+0.55/5/4-3/5/8/7=?(简算)](/uploads/image/z/198718-70-8.jpg?t=0.325%2A0.8%2B0.55%2F5%2F4-3%2F5%2F8%2F7%3D%3F%28%E7%AE%80%E7%AE%97%EF%BC%89)
0.325*0.8+0.55/5/4-3/5/8/7=?(简算)
0.325*0.8+0.55/5/4-3/5/8/7=?(简算)
0.325*0.8+0.55/5/4-3/5/8/7=?(简算)
0.325*0.8+0.55/5/4-3/5/8/7
=0.325*0.8+0.55*0.8-3/5×7/8
=(0.325+0.55)×0.8-3/5×7/8
=7/8×0.8-0.6×7/8
=7/8×(0.8-0.6)
=7/8×1/5
=7/40