29.7-(6.2+0.84)*4 简便运算

分类: 作业答案 • 2022-01-19 10:52:43

问题描述：

答

29.7-(6.2+0.84)*4
=29.7-7.04*4
=29.7-(7+0.04)*4
=29.7-7*4-0.04*4
=29.7-28-0.16
=1.7-0.16
=1.54