3.8+2.2×(0.7×0.3)简便运算_数学解答

3.8+2.2×(0.7×0.3)简便运算

人气：287 ℃　时间：2020-02-03 21:04:14

解答

3.8+2.2×(0.7×0.3)
=3.8+2.2*0.21=3.8+(2+0.2)*0.21=3.8+0.42+0.042=4.22+0.042=4.262