Question

21.6Ⅹ18-21.6X7-21.7的简便计算

Answer 1

21.6×18-21.6×7-21.7
=21.6×(18-7-1)-0.01
=216-0.01
=215.9

Answer 2

你好，计算结果是215.9
21.6Ⅹ18-21.6X7-21.7
=21.6Ⅹ（18-7）-（21.6+0.1）
=21.6Ⅹ11-（21.6Ⅹ1）-0.1
=21.6Ⅹ（11-1）-0.1
=216-0.1
=215.9