(+17又3/4)-(6.25)-(-8又1/2)-(+0.75)-22又1/4
问题描述:
(+17又3/4)-(6.25)-(-8又1/2)-(+0.75)-22又1/4
答
全部化成分数,然后通分,把分母化成4,分子相加减就可以了,答案是:-3已知|a|=1又2/3,|b|=2又5/6,求a-b的值a=±5/3,b=±17/6分情况讨论:①a=5/3,b=17/6,a-b=﹣7/6②a=5/3,b=﹣17/6 ,a-b=9/2③a=﹣5/3,b=17/6 , a-b=﹣9/2 ④a=﹣5/3,b=﹣17/6,a-b=7/6