计算:12(m+1/4 -3m/4)-(2m+1)

问题描述:

计算:12(m+1/4 -3m/4)-(2m+1)

12(m+1/4 -3m/4)-(2m+1)
=12*m+1-3m/4 - 2m-1
=-(2m+1)3-2m-1
=-6m+3-2m-1
=-8m+2
m+1/4是不是一起的啊 如果是我做的就对了

原式=12(m/4 + 1/4)-2m-1
=3m+3-2m-1
=m+2

12(m+1/4 -3m/4)-(2m+1)
=12m+12×1/4 -12×3m/4-2m-1
=12m+3-9m-2m-1
=m+2