吉祥天宝赵丽颖怀孕:数学题大家帮帮忙!!20分白送拉,`

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1:17-8/(-2)+4(-6) 2:-1.25X5/2(8/-6/2) 3:(1/3—3/5+7/10)乘(-30/7) 4:-24/[-4/3+11/2乘(-1/6—0.25)
要用方程,详细点,好提高悬赏咯

17 - 8/(-2) + 4(-6)=-3
-5/4*5/2(8/-6/2)=25/12
(1/3 - 3/5 + 7/10)*(-30/7)=-13/7
-24/(-4/3 + 11/2*(-1/6 - 1/4))=192/29

17-8/(-2)+4(-6)
= 17 -(-4) + (-24)
= 17 + 4 - 24
= -3

-1.25X5/2*(8/-6/2) ---> 假如是 (8/(-6/2))
= (-6.25)/2*(8/(-3))
= (-12.5)*(-8/3)
= (-25/2)*(-8/3)
= 100/3

-1.25X5/2*(8/-6/2) ---> 假如是 ((8/-6)/2)
= (-6.25/2)*((-4/3)/2)
= (-12.5)*(-8/3)
= 100/3

(1/3—3/5+7/10)*(-30/7)
=(10/30-18/30+21/30)*(-30/7)
=(13/30)*(-30/17)
= -13/17

-24/[-4/3+11/2*(-1/6—0.25)]
= -24/[(-4/3)+11/2*(-1/6-1/4)]
= -24/[(-4/3)+(11/2)*(-4/24-6/24)]
= -24/[(-4/3)+(11/2)*(-10/24)]
= -24/[(-4/3)+(-55/24)]
= -24/[(-32/24)+(-55/24)]
= -24/[-87/24]
= 87

17-8/(-2)+4(-6)
= 17 -(-4) + (-24)
= 17 + 4 - 24
= -3

-1.25X5/2*(8/-6/2) ---> 假如是 (8/(-6/2))
= (-6.25)/2*(8/(-3))
= (-12.5)*(-8/3)
= (-25/2)*(-8/3)
= 100/3

-1.25X5/2*(8/-6/2) ---> 假如是 ((8/-6)/2)
= (-6.25/2)*((-4/3)/2)
= (-12.5)*(-8/3)
= 100/3

(1/3—3/5+7/10)*(-30/7)
=(10/30-18/30+21/30)*(-30/7)
=(13/30)*(-30/17)
= -13/17

-24/[-4/3+11/2*(-1/6—0.25)]
= -24/[(-4/3)+11/2*(-1/6-¼)]
= -24/[(-4/3)+(11/2)*(-4/24-6/24)]
= -24/[(-4/3)+(11/2)*(-10/24)]
= -24/[(-4/3)+(-55/24)]
= -24/[(-32/24)+(-55/24)]
= -24/[-87/24]
= 87

不难的啊~

好好读书吧