0 前三项去掉绝对值符号都换个顺序,原因被减数分母小,所以反而大,最后一项绝对值前是负号,你自已每项按顺序把绝对值符号对掉你就发项了,都抵消了.
|1/11-1/10|+|1/12-1/11|+|1/13-1/12|-|1/13-1/10|=?
1个回答
相关问题
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(1/10+1/11+1/12+1/13)*(1/11+1/12+1/13+1/14)-(1/10+1/11+1/12+
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(13又1/13+12又1/12-11又1/11)/(13又1/13-10又1/11+11又1/12)
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1/(10+11)+1/(11+12)+1/(12+13)+1/(13+14)+```1/(59+60)=
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-1/10*11-1/11*12-1/12*13-……-1/19*20
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初中数学-1/10*11-1/11*12-1/12*13.-1/19*20
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数学题-1/10*11-1/11*12-1/12*13.-1/19*20=?
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-1/10×11-1/11×12-1/12×13—……—1/19×20
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1/10x11+1/11x12+1/12x13+.+1/99x100
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1/9X10+1/10X11+1/11X12+1/12X13+…+1/17X18=
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巧算:(1) 1/8*9+1/9*10+1/10*11+1/11*12+1/12*13+...+1/99*100(2)