请各位教教我怎么巧算下列各题!谢了!烦请各位高手教老弟一下!1/5×7+(1+1/5)×3 1/10+1/40+1/88+1/154+1/238+1/340 93又1/11÷16100²+98²+96²+94²+92²-(99²+97²+95²+93²+91²

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/13 05:44:45
请各位教教我怎么巧算下列各题!谢了!烦请各位高手教老弟一下!1/5×7+(1+1/5)×3     1/10+1/40+1/88+1/154+1/238+1/340   93又1/11÷16100²+98²+96²+94²+92²-(99²+97²+95²+93²+91²

请各位教教我怎么巧算下列各题!谢了!烦请各位高手教老弟一下!1/5×7+(1+1/5)×3 1/10+1/40+1/88+1/154+1/238+1/340 93又1/11÷16100²+98²+96²+94²+92²-(99²+97²+95²+93²+91²
请各位教教我怎么巧算下列各题!谢了!
烦请各位高手教老弟一下!1/5×7+(1+1/5)×3 1/10+1/40+1/88+1/154+1/238+1/340
93又1/11÷16
100²+98²+96²+94²+92²-(99²+97²+95²+93²+91²)
怎么巧算啊!请各位教教我!我感激不尽!

请各位教教我怎么巧算下列各题!谢了!烦请各位高手教老弟一下!1/5×7+(1+1/5)×3 1/10+1/40+1/88+1/154+1/238+1/340 93又1/11÷16100²+98²+96²+94²+92²-(99²+97²+95²+93²+91²
100²+98²+96²+94²+92²-(99²+97²+95²+93²+91²)
a²-b²=(a+b)(a-b)
100²-99²=199