(5.15-3.25)*0.4+0.36的简便运算方法_数学解答

(5.15-3.25)*0.4+0.36的简便运算方法

人气：381 ℃　时间：2019-12-01 13:55:35

解答

(5.15-3.25)*0.4+0.36
＝(5.15-3.25)*0.4+0.9*0.4
=(5.15+0.9-3.25)*0.4
=(6.05-3.25)*0.4
=2.8x0.4
=1.12