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-17+23+(-16)-(-7)?
-17+23+(-16)-(-7)?三分之二-六分之五-八分之七+十二分之一?0-二十一又三分之二+(+三有四分之一)-(-三分之二)-(+四分之一)?快速回复...
-17+23+(-16)-(-7)? 三分之二-六分之五-八分之七+十二分之一? 0-二十一又三分之二+(+三有四分之一)-(-三分之二)-(+四分之一)? 快速回复
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2012-08-05 · 知道合伙人教育行家
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-17+23+(-16)-(-7)
= - 17+(23-16-7)
= -17+0
= -17
三分之二-六分之五-八分之七+十二分之一
= 2/3 - 5/6 - 7/8 + 1/12
= 2/3 - (1/2+1/3) - 7/8 + (1/3-1/4)
= 2/3 - 1/2+1/3 - 7/8 + 1/3-1/4
= (2/3+1/3+1/3) - (1/2+7/8+1/4)
= (1+1/3) - (1+5/8)
= 1/3-5/8
= (8-15)/24
= -7/24
0-二十一又三分之二+(+三有四分之一)-(-三分之二)-(+四分之一)
= 0 - (11+2/3) + (3+1/4) - (-2/3) - (1/4)
= (0-11+3) + (-2/3+1/4+2/3-1/4)
= -8+0
= -8
= - 17+(23-16-7)
= -17+0
= -17
三分之二-六分之五-八分之七+十二分之一
= 2/3 - 5/6 - 7/8 + 1/12
= 2/3 - (1/2+1/3) - 7/8 + (1/3-1/4)
= 2/3 - 1/2+1/3 - 7/8 + 1/3-1/4
= (2/3+1/3+1/3) - (1/2+7/8+1/4)
= (1+1/3) - (1+5/8)
= 1/3-5/8
= (8-15)/24
= -7/24
0-二十一又三分之二+(+三有四分之一)-(-三分之二)-(+四分之一)
= 0 - (11+2/3) + (3+1/4) - (-2/3) - (1/4)
= (0-11+3) + (-2/3+1/4+2/3-1/4)
= -8+0
= -8
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