(-5)x8x(-7)x(-0.25)= (-5/12)x8/15x3/2x(-2/3)x0x(-1)= (-1)x(-5/4)x8/15x3/2x(-2/3)x0x(-1)=
问题描述:
(-5)x8x(-7)x(-0.25)= (-5/12)x8/15x3/2x(-2/3)x0x(-1)= (-1)x(-5/4)x8/15x3/2x(-2/3)x0x(-1)=
答
(-5)x8x(-7)x(-0.25)= -(8*0.25*5*7)=-70
(-5/12)x8/15x3/2x(-2/3)x0x(-1)=0
(-1)x(-5/4)x8/15x3/2x(-2/3)x0x(-1)=0