(-23)-(-5)+(-64)-(-12)==125*(-3.874)*(-8)==(1/6-20/3+5/4-5/12)*(-15*4)==(-7)*(-4/19)+13*(-4/19)+(-6)*(-4/19)==
(-23)-(-5)+(-64)-(-12)
=
=
125*(-3.874)*(-8)
=
=
(1/6-20/3+5/4-5/12)*(-15*4)
=
=
(-7)*(-4/19)+13*(-4/19)+(-6)*(-4/19)
=
=
(-23)-(-5)+(-64)-(-12)
= (-18)-52
= 70
125*(-3.874)*(-8)
= (-1000)*(-3.874)
= 3874
第一题=-70
第二题=3874
第三题=335
第四题=0
=(-23)+5-64+12
= -70
=(-1000)x(-3.874)
=3874
=(1/6-40/6+15/12-5/12)x(-60)
= -10+400-75+25
=340
=28/19-52/19+24/19
=0
(-23)-(-5)+(-64)-(-12)
= (-18)+(-52)
= -70
125*(-3.874)*(-8)
= 3874
(1/6-20/3+5/4-5/12)*(-15*4)
= (3/12-80/12+15/12-5/12)*-45/12
= -68/12*-45/12
=21/1/4
(1)=-23+5-64+12=-70(2)=125*(-8)*(-3.874)=(-1000)*(-3.874)=3874(3)=1/6*(-60)-20/3*(-60)+5/4*(-60)+5/12*(-60)=-10+400-75-25=290(4)=(-4/19)*(-7+13-6)=(-4/19)*0=0这么简单啊,以后好好学习,不要问了~!...
1.=-23+5-64+12=-70;2.-1000x-3.874=3874;3.=-17/3x.60=340;4.-4/19x(-7+13-6)=0