1991+199.1+19.91+1.991+0.1991 怎么简便运算
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/05 11:45:22
1991+199.1+19.91+1.991+0.1991 怎么简便运算
1991+199.1+19.91+1.991+0.1991 怎么简便运算
1991+199.1+19.91+1.991+0.1991 怎么简便运算
=1991*(1+0.1+0.01+0.001+0.0001)=1991*1.1111=(2000-9)*1.1111
=2222.2-9.9999=2222.2-10+0.0001=2212.0001
1991+199.1+19.91+1.991+0.1991=2000+200+20+2+0.2-9-0.9-0.09-0.009-0.0009
=2222.2-10+0.0001=2212.2001
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
巧算题求解1991+199.1+19.91+1.991
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
求 算术 1991+199.1+19.91+1.991=?求 算术 1991+199.1+19.91+1.991=?要一些过程,不要结果,要结果计算机
1991+199.1+19.91+1.991,用简便算法怎么算?四年级下学期奥数,应该有人会的,求帮助,谢啦~
19991+199.1+19.91+1.991 88.88*0.9+22.22*6.4 简算
有一串数199141419914141……共1991位数?其中有几个1.9.4
1993×199.2-1992×199.1=( )
1993乘199.2-1992乘199.1思路
150-120除以1.4×0.84 简算17又2/5×37-174×1.9+17又2/5×82 简算1999又1991/1999×1/4-1997/1999 简算
1991*1991-1990*1990
2.5x(1.9+1.9+1.9+1.9)=?
1993乘199.2-1992乘199.1求思路根剧
1993乘199.2-1992乘199.1等于几?