作业帮(-1 100/101)*(+99 17/19)*[7 1/8+(-4 3/4)*3/2]*(-199) 急
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![(-1 100/101)*(+99 17/19)*[7 1/8+(-4 3/4)*3/2]*(-199) 急](/uploads/image/z/25988-68-8.jpg?t=%28-1+100%2F101%29%2A%28%2B99+17%2F19%29%2A%5B7+1%2F8%2B%28-4+3%2F4%29%2A3%2F2%5D%2A%28-199%29+%E6%80%A5)
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(-1 100/101)*(+99 17/19)*[7 1/8+(-4 3/4)*3/2]*(-199) 急
(-1 100/101)*(+99 17/19)*[7 1/8+(-4 3/4)*3/2]*(-199) 急
(-1 100/101)*(+99 17/19)*[7 1/8+(-4 3/4)*3/2]*(-199) 急
先算中间部分
7又1/8+(-4又3/4)*3/2=57/8+（-19/4）*3/2=57/8-57/8=0
所以(-1 100/101)*(+99 17/19)*[7 1/8+(-4 3/4)*3/2]*(-199)=0