作业帮1.5×[19/21÷6又1/3×（0.7－0.66）]×4.9=?急 谢
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/28 23:12:12
![1.5×[19/21÷6又1/3×（0.7－0.66）]×4.9=?急 谢](/uploads/image/z/17253-45-3.jpg?t=1.5%C3%97%5B19%2F21%C3%B76%E5%8F%881%2F3%C3%97%EF%BC%880.7%EF%BC%8D0.66%EF%BC%89%5D%C3%974.9%3D%3F%E6%80%A5+%E8%B0%A2)
xŒON@ƯRIdf tD/6Mn6F那 ]qgDhpCx|oö{H2q(WDC(":Ѩ{{ qx ~I2IQq՞HQHZfS .5(N샾Uhԥw窱hmQmuWOCZQeoGȆ-|9f"Uř4F|ye\L7ޘǎ{2yP2c<'Ή>dT.6O\(lY84ku VD74}=$Q;d5:4
1.5×[19/21÷6又1/3×（0.7－0.66）]×4.9=?急 谢
1.5×[19/21÷6又1/3×（0.7－0.66）]×4.9=?急 谢
1.5×[19/21÷6又1/3×（0.7－0.66）]×4.9=?急 谢
=1.5*[19/21÷6又1/3*0.04]*4.9
=1.5*[19/21*3/19*0.04]*4.9
=1.5*0.04*4.9/7
=0.42
no
=1.5*〔19/21*3/19*(7/10-66/100)*49
=1.5*[1/7*7/10-1/7*66/100)*49
=1.5*4/700*49
=42/100
=0.42
=1.5*〔19/21*3/19*(7/10-66/100)*49
=1.5*[1/7*7/10-1/7*66/100)*49
=1.5*4/700*49
=42/100
=0.42
1.5×[19/21÷6又1/3×（0.7－0.66）]×4.9=0.042
过程：
6又1/3=19/3 这你知道吧
1.5×[19/21×3/19×0.04]×4.9 这个中括号可以去掉
=1.5×19/21×3/19×0.04×4.9 可以移动一个顺序
=1.5×0.04×19/21×3/19×4.9 19/21×3/19=1/7
=0.06×1/7×4.9
=0.06×0.7
=0.042