1.25x6.78+12.5x7+125x0.0322
=1.25x(6.78+10x7+100x0.322)
=1.25x(6.78+70+3.22)
=1.25x(6.78+3.22+70)
=1.25x(10+70)
=1.25x80
=100
谢谢,请采纳
=1.25*6.78+1.25*3.22+12.5*7
=1.25*(6.78+3.22)+12.5*7
=1.25*10+12.5*7
=12.5*1+12.5*7
=12.5*(1+7)
=12.5*8
=100
1.25*6.78+1.25*70+1.25*3.22
1.25*(6.78+70+3.22)
1.25*80
100