9.8*0.74+0.148的简便运算

分类: 作业答案 • 2022-01-02 19:56:24

问题描述：

9.8*0.74+0.148的简便运算

答

=（98*74+148）/1000
=[(100-2)*74+148]/1000
=[7400-2*74+148]/1000

答

9.8*0.74+0.148
=（10-0.2）*0.74+0.148
=7.4

答

=9.8*0.74+0.2*0.74
=(9.8+0.2)*0.74
=10*0.74
=7.4