来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/05/15 16:09:04
38.8*8.1+513*0.19+11*3.25该如何做
38.8×8.1+513×0.19+11×3.25
=388×0.81+（388+125）×0.19+11×3.25
=388×0.81+388×0.19+125×0.19+11×3.25
=388×（0.81+0.19）+1.25×19+11×（1.25+2）
=388×1+1.25×19+11×1.25+11×2
=388+1.25×（19+11）+22
=388+22+1.25×30
=410+37.5
=447.5
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