1樓:匿名使用者
(﹣1/63)÷1/9-(﹣1/63)÷2/7+(﹣1/63)÷2/3-(﹣1/63)÷4/21
(-1/63)x9-(﹣1/63)x7/2+(﹣1/63)x3/2-(﹣1/63)x21/4(除以一個數等於乘以他的倒數)
=(-1/63)x(9-7/2+3/2-21/4) (乘法分配律)
=(-1/63)x(9-2-21/4)
=(-1/63)x7/4
=-1/36
我的答案肯定是對的^_^
2樓:水玲瓏的部落格
(﹣1/63)÷1/9-(﹣1/63)÷2/7+(﹣1/63)÷2/3-(﹣1/63)÷4/21
=(-1/63)x9-(-1/63)x7/2+(-1/63)x3/2-(-1/63)x21/4
=(-1/63)x(9-7/2+3/2-21/4)=(-1/63)x3/4
=-1/84
3樓:匿名使用者
(-1/63)×(9-7/2-3/2-21/4)=(-1/63)×(-1)=1/63
(-1/63)÷(1/9-2/7+2/3-4/21)
4樓:繁人凡人
(-1/63)÷(1/9-2/7+2/3-4/21)= (-1/63)÷(1/9-6/21+6/9-4/21)= (-1/63)÷(7/9-10/21)= (-1/63)÷(49/63-30/63)= (-1/63)÷(19/63)
=-1/19
(-1/63)÷(1/9-2/7+2/3-1/3)
5樓:
原式=一1/63÷(7/63-18/63+21/63)
=-1/63÷10/63
=-1/10
6樓:
(-1/63)÷(1/9-2/7+2/3-1/3)=-1/10
計算如下:
(1/63)÷(1/9-2/7+2/3-1/14)
7樓:新野旁觀者
1/63÷(1/9-2/7+2/3-1/14)=1÷(1/9×63-2/7×63+2/3×63-1/14×63)=1÷(7-18+42-4.5)
=1÷26.5
=2/53
8樓:匿名使用者
(1/63)÷(1/9-2/7+2/3-1/14)=(1/63)÷(7/9-5/14)
=(1/63)÷(53/126)
=126÷(63x53)
=126÷3339
=2/53
(-1/63)/(1/9-2/7+2/3-1/14)答案是多少速度加上算式
9樓:世翠巧
解1題:原式=(-1/63)÷(1/9-2/7+2/3-1/14)=(-1/63)÷[(1/9+2/3)-(2/7+1/14)]=(-1/63)÷(7/9-5/14)
=(-1/63)÷(53/126)
=(-1/63)×126/53
= -(1/63×126/53)
= -2/53
解2題:原式=(-12又2/3)÷1.25-(-8又1/3)÷(-1.25)+(+20又1/3)÷1.25
=-38/3×5/4-25/3×5/4+61/3×5/4=[(-38/3)+(-25/3)+61/3]×5/4=[(-63/3)+61/3]×5/4
=(-2/3)×5/4
= -(2/3×5/4)
= -5/6
用簡便方法計算:-1/63除以(1/9-2/7+2/3-1/14)
10樓:士妙婧
-1/63除以(1/9-2/7+2/3-1/14)=-1÷63÷(1/9-2/7+2/3-1/14)=-1÷[63×(1/9-2/7+2/3-1/14) ]=-1÷(63×1/9-63×2/7+63×2/3-63×1/14)=-1÷(7-18+42-9/2)
=-1÷53/2
=-2/53
(-1/63)÷(1/14-1/9+2/7-2/3)
11樓:佚而散
=1/63÷(-1/14+1/9-2/7-2/3)
=1/63÷(7/9-5/14)
=2/53
(1/9+2/7-1/3+1/14)÷(-1/63)要過程
12樓:炸裂演技
=-(1/9+2/7-1/3+1/14)*63
=-(7+18-21+4.5)
=-8.5
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