问题标题:
(+25/4)+(+1/2)+(-6.25)+(+1/3)+(-7/9)+(-5/6)
问题描述:
(+25/4)+(+1/2)+(-6.25)+(+1/3)+(-7/9)+(-5/6)
戴佳筑回答:
(+25/4)+(+1/2)+(-6.25)+(+1/3)+(-7/9)+(-5/6)
原式=[(+25/4)+(-6.25)]+[(+1/3)+(+1/2)+(-5/6)])+(-7/9)
=0+0+(-7/9)
=-7/9
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