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数学
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有理数的加法 计算
(-1/3)-l5/12-(-3/4)l
人气:361 ℃ 时间:2020-04-24 13:28:48
解答
(-1/3)-|5/12-(-3/4)|
=(-1/3)-|5/12+3/4|
=(-1/3)-|5/12+9/12|
=(-1/3)-|14/12|
=(-1/3)-14/12
=-1/3-14/12
=-(1/3+14/12)
=-(4/12+14/12)
=-18/12
化简
=-3/2
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