作业帮[(7又2/8+(+4又1/2)+(-18又1/8)]+[(-2.5)+(-9)]=?
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/30 11:13:27
![[(7又2/8+(+4又1/2)+(-18又1/8)]+[(-2.5)+(-9)]=?](/uploads/image/z/657127-55-7.jpg?t=%5B%287%E5%8F%882%2F8%2B%28%2B4%E5%8F%881%2F2%29%2B%28-18%E5%8F%881%2F8%29%5D%2B%5B%28-2.5%29%2B%28-9%29%5D%3D%3F)
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[(7又2/8+(+4又1/2)+(-18又1/8)]+[(-2.5)+(-9)]=?
[(7又2/8+(+4又1/2)+(-18又1/8)]+[(-2.5)+(-9)]=?
[(7又2/8+(+4又1/2)+(-18又1/8)]+[(-2.5)+(-9)]=?
[(7又2/8+(+4又1/2)+(-18又1/8)]+[(-2.5)+(-9)]=?
= 7+ 1/4 + 4 + 1/2 - 18 - 1/8 -2 -1/2 - 9
= 7 + 4 - 18 -2 - 9 + 3/8- 1/8-1/2
= - 9 -1/4
= - 9又 4分之1
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