9/10+99/100+999/1000+9999/1000+99999/10000
9/10+99/100+999/1000+9999/1000+99999/10000
用简便方法计算:9/10+99/100+999/1000+9999/10000+99999/100000.
10分之9加上100分之99加上1000分之999加上10000分之9999加上10000分之99999等于多少
简便运算:9/10+99/100+999/1000+9999/10000+0.1111
9+99+999+9999+99999+999999-10000
9+99+999+9999+9999+99999=?
求:1.9/10+99/100+999/1000+9999/10000(分数计算题)2.189÷189又189/190(
9+99+999+9999+99999=?
9十99+999+9999+99999
9+99+999+9999+99999 = =
(9+99+999+9999+99999+999999+9999999)×9×99×999×9999×99999÷900
100+1000+10000+9999=?