原式=(30x2)x(25x4)=60x100=6000
30x25x2x4=30x2x(25x4)=60x100=6000谢谢,请采纳
(30*25)*2*4=(30*2)*(25*4)=60*100=6000
(30×25)×2×4=30×25×2×4=30×2×25×4=60×100=6000
(30×25)×2×4=(30×2)×(25×4)=60×100=6000