(99+17/18)×9的简便运算
问题描述:
(99+17/18)×9的简便运算
答
(99+17/18)×9
=(100-1+17/18) ×9
=100×9-1×9+17/18×9
=900-9+8.5
=900-9+9-0.5
=899.5