作业帮0.28*0.45+1.85 简便计算
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 11:18:47
0.28*0.45+1.85 简便计算
0.28*0.45+1.85 简便计算
0.28*0.45+1.85 简便计算
0.28×0.45+1.85
=0.28×（0.5-0.05）+（2-0.15）
=0.28×0.5-0.28×0.05+2-0.15
=0.14-0.014+2-0.15
=2-0.014-0.01
=1.976
0.28×0.45+1.85
=0.07×4×0.45+1.85
=0.07×(4×0.45)+1.85
=0.07×1.8+1.85
=0.126+1.85
=1.976
=0.28×（0.5-0.05）+（2-0.15）
=0.28×0.5-0.28×0.05+2-0.15
=0.14-0.014+2-0.15
=2-0.014-0.01
=1.976