计算:1/2+1/6+1/12+1/20+/+1/30+1/42+1/56+1/72+1/90
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/23 02:51:42
计算:1/2+1/6+1/12+1/20+/+1/30+1/42+1/56+1/72+1/90
要意思
要意思
![计算:1/2+1/6+1/12+1/20+/+1/30+1/42+1/56+1/72+1/90](/uploads/image/z/3657658-58-8.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A1%2F2%2B1%2F6%2B1%2F12%2B1%2F20%2B%2F%2B1%2F30%2B1%2F42%2B1%2F56%2B1%2F72%2B1%2F90)
原式=(2520+840+420+252+180+120+56)/5040=9388/5040
化学计算1(化学计算)
化学计算1(化学反应计算)
计算:1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90(要求简便计算)
计算:1-56
计算:(1+12
计算:(1−12
计算.(1-12
1:计算.2:填一填.
计算:1/6+1/12+1/20+1/30……+1/2009*2010 简便计算
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90简便计算
计算1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90
计算:1/2+1/6+1/12+1/20+/+1/30+1/42+1/56+1/72+1/90