来自樊瑜波的问题
20-19-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1用简便方法计算上面一题
20-19-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1用简便方法计算上面一题
1回答
2020-06-17 01:09
20-19-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1用简便方法计算上面一题
20-19-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1用简便方法计算上面一题
20-19-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1
=20-[(19+1)*9+10]
=20-190
=-170