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有理数加法运算(-1/2)+31/4+2.75+(-61/2)怎么解?
人气:377 ℃ 时间:2020-03-15 12:56:00
解答
(-1/2)+31/4+2.75+(-61/2)
=-2/4+31/4+11/4-122/4
=(-2+31+11-122)/4
=-82/4
=-41/2
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