作业帮1.991+1.992+1.993+...+2.001+2.002+2.003
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/05 16:08:14
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1.991+1.992+1.993+...+2.001+2.002+2.003
1.991+1.992+1.993+...+2.001+2.002+2.003
1.991+1.992+1.993+...+2.001+2.002+2.003
=13*(1.991+2.003)/2
=13*3.994/2
=25.961
1.991+1.992+1.993+...+2.001+2.002+2.003
巧算0.991+1.992+2.993+3.994
计算：1.992-1.98*1.99+0.992
(1.992+19.92+199.2)/0.111 简便计算
1.2+1.92+1.992+.+1.99.+1.99..怎样计算
1991＋199.1＋19.91＋1.991
1991+199.1+19.91+1.991=?(简便方法)
简算题1991+199.1+19.91+1.991=
1991＋199.1＋19.91＋1.991
1+1.91+1.991+ …+1.9999991等于多少?
巧算题求解1991+199.1+19.91+1.991
简便运算 2008+200.8+20.08+200.8+1992+199.2+19.92+1.992
2008+200.8+20.08+2.008+199.2+19.92+1.992=
(2008+200.8+20.08+2.008+1992+199.2+19.92+1.992)怎么写?
1991+199.1+19.91+1.991+0.1991 怎么简便运算
用简便方法计算：1991+199.1+19.91+1.991
19991+199.1+19.91+1.991 88.88*0.9+22.22*6.4 简算
1.1+1.91+1.991+1.9991+...+1.9999999991怎么简算