简便计算:0.11*9*0.19+0.99*0.81和0.9/3.05*0.9*3.05

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 13:13:33
简便计算:0.11*9*0.19+0.99*0.81和0.9/3.05*0.9*3.05简便计算:0.11*9*0.19+0.99*0.81和0.9/3.05*0.9*3.05简便计算:0.11*9*

简便计算:0.11*9*0.19+0.99*0.81和0.9/3.05*0.9*3.05
简便计算:0.11*9*0.19+0.99*0.81和0.9/3.05*0.9*3.05

简便计算:0.11*9*0.19+0.99*0.81和0.9/3.05*0.9*3.05
0.11*9*0.19+0.99*0.81
=0.99*0.19+0.99*0.81
=0.99*(0.19+0.81)
=0.99*1
=0.99
0.9/3.05*0.9*3.05
把3.05约分
0.9/3.05*0.9*3.05
=0.9*0.9=0.81

0.11*9*0.19+0.99*0.81=0.99*(0.19+0.81)=0.99*1=0.99
0.9/3.05*0.9*3.05=0.9*0.9*(3.05/3.05)=0.81

0.99
0.81

0.11*9*0.19+0.99*0.81=0.99*0.19+0.99*0.81=0.99*(0.19+1.81)=0.99*1=0.99
0.9/3.05*0.9*3.05=0.9*0.9=0.81