199900+99+99999×99999
9999999999+999999999+99999999+99999+9999+999+99+9=?
巧算 (1)5×999+5+99×7+7+3×9+3 = = = = = (2)99999+
99999+77778+33333×66666 怎样用简便方法计算
9又1/7+99又2/7+999又3/7+9999又4/7+99999又5/7+999999又6/7简算
9+99+999+9999+99999=?
99+999+9999+99999,简便计算
9+99+999+9999+9999+99999=?
9+99+999+9999+99999+999999-10000
9十99+999+9999+99999
9+99+999+9999+99999 = =
(9+99+999+9999+99999+999999+9999999)×9×99×999×9999×99999÷900
99999乘以99999等于多少?