原式=8.35*0.8+8.35*0.2-2.35*0.8=0.8*(8.35-2.35)+8.35*0.2=4.8+8.35*0.2=4.8+8.35*2/10=4.8+16.7/10=4.8+1.67=6.47,望采纳,谢谢!
8.35-2.35×0.8
=8.35-2.35×(1-0.2)
=8.35-2.35+0.47
=6.47
望采纳,谢谢!
=6+2.35-2.35×0.8
=6+2.35×(1-0.8)
=6+2.35×0.2
=6+0.47
=6.47
8.35-2.35×0.8
=6+2.35-2.35×0.8
=6+2.35×(1-0.8)
=6+2.35×0.2
=6+0.47
=6.47