29.7-(6.2+0.84)*4 简便运算_数学解答

29.7-(6.2+0.84)*4 简便运算

人气：482 ℃　时间：2020-06-04 11:45:48

解答

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