(1)15.5+(-3又4/7)+(-5又1/2)+(-4又3/7)=?(2)1/2+(-2/3)+4/5+(-1/2)+(-1/3)=?(3)2又2/4+0.25+(-2又1/4)+2又1/2+(-2.75)=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 15:54:58
![(1)15.5+(-3又4/7)+(-5又1/2)+(-4又3/7)=?(2)1/2+(-2/3)+4/5+(-1/2)+(-1/3)=?(3)2又2/4+0.25+(-2又1/4)+2又1/2+(-2.75)=?](/uploads/image/z/12567458-2-8.jpg?t=%281%2915.5%2B%28-3%E5%8F%884%2F7%29%2B%28-5%E5%8F%881%2F2%29%2B%28-4%E5%8F%883%2F7%29%3D%3F%282%291%2F2%2B%28-2%2F3%29%2B4%2F5%2B%28-1%2F2%29%2B%28-1%2F3%29%3D%3F%283%292%E5%8F%882%2F4%2B0.25%2B%28-2%E5%8F%881%2F4%29%2B2%E5%8F%881%2F2%2B%28-2.75%29%3D%3F)
(1)15.5+(-3又4/7)+(-5又1/2)+(-4又3/7)=?(2)1/2+(-2/3)+4/5+(-1/2)+(-1/3)=?(3)2又2/4+0.25+(-2又1/4)+2又1/2+(-2.75)=?
(1)15.5+(-3又4/7)+(-5又1/2)+(-4又3/7)=?
(2)1/2+(-2/3)+4/5+(-1/2)+(-1/3)=?
(3)2又2/4+0.25+(-2又1/4)+2又1/2+(-2.75)=?
(1)15.5+(-3又4/7)+(-5又1/2)+(-4又3/7)=?(2)1/2+(-2/3)+4/5+(-1/2)+(-1/3)=?(3)2又2/4+0.25+(-2又1/4)+2又1/2+(-2.75)=?
(1)15.5+(-3又4/7)+(-5又1/2)+(-4又3/7)
=[15.5+(-5又1/2)]+[(-3又4/7)+(-4又3/7)]
=10+(-8)
=2
(2)1/2+(-2/3)+4/5+(-1/2)+(-1/3)
=[1/2+(-1/2)]+(-2/3)+(-1/3)+4/5
=0+(-1)+4/5
=-1/5
(3)2又2/4+0.25+(-2又1/4)+2又1/2+(-2.75)
=(2又2/4+2又1/2)+[(-2又1/4)]+(-2.75)]+0.25
=5+(-5)+0.25
=0.25
1、2
2、-1/5
3、0.25
(1)15.5+(-3又4/7)+(-5又1/2)+(-4又3/7)
=15.5+(-5又1/2)+[(-3又4/7)+(-4又3/7)]
=10+(-8)=2
(2)1/2+(-2/3)+4/5+(-1/2)+(-1/3)
=1/2+(-1/2)+[(-2/3)+(-1/3)]
=0+(-1)
=-1
(3)2又2/4+0.25+(-2又1/4)+2又1/2+(-2.75)
=2又2/4+2又1/2+【0.25+(-2.75)】
=5+(-2.5)
=-2.5
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