简便计算:20-2/3-2/15-2/35-2/63-2/99
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 16:09:18
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简便计算:20-2/3-2/15-2/35-2/63-2/99
简便计算:20-2/3-2/15-2/35-2/63-2/99
简便计算:20-2/3-2/15-2/35-2/63-2/99
20-2/3-2/15-2/35-2/63-2/99
=20-(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)
=20-(1-1/11)
=20-10/11
=19又1/11
上式=20-(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)
=20-(1-1/11)
=20-10/11
=210/11