1.如果a=-1/4,b=-2,c=-2 3/4,那么|a|+|b|-|c|=()2.+0.125+(+3 1/4)+(-3 1/8)-1/8-(-1/4)3.3.75-[(-3/8)+(-1/2)-(-5/6)+4 2/3]-0.1254.(-1 1/2)-1 1/4+(-2 1/2)-(-3 3/4)-(-1 1/4)5.1-5/12+4/15+1/12-14/15-1 19/20
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![1.如果a=-1/4,b=-2,c=-2 3/4,那么|a|+|b|-|c|=()2.+0.125+(+3 1/4)+(-3 1/8)-1/8-(-1/4)3.3.75-[(-3/8)+(-1/2)-(-5/6)+4 2/3]-0.1254.(-1 1/2)-1 1/4+(-2 1/2)-(-3 3/4)-(-1 1/4)5.1-5/12+4/15+1/12-14/15-1 19/20](/uploads/image/z/8498116-28-6.jpg?t=1.%E5%A6%82%E6%9E%9Ca%3D-1%2F4%2Cb%3D-2%2Cc%3D-2+3%2F4%2C%E9%82%A3%E4%B9%88%7Ca%7C%2B%7Cb%7C-%7Cc%7C%3D%EF%BC%88%EF%BC%892.%2B0.125%2B%EF%BC%88%2B3+1%2F4%EF%BC%89%2B%EF%BC%88-3+1%2F8%EF%BC%89-1%2F8-%EF%BC%88-1%2F4%EF%BC%893.3.75-%5B%28-3%2F8%29%2B%28-1%2F2%29-%28-5%2F6%29%2B4+2%2F3%5D-0.1254.%28-1+1%2F2%29-1+1%2F4%2B%EF%BC%88-2+1%2F2%EF%BC%89-%28-3+3%2F4%29-%28-1+1%2F4%295.1-5%2F12%2B4%2F15%2B1%2F12-14%2F15-1+19%2F20)
1.如果a=-1/4,b=-2,c=-2 3/4,那么|a|+|b|-|c|=()2.+0.125+(+3 1/4)+(-3 1/8)-1/8-(-1/4)3.3.75-[(-3/8)+(-1/2)-(-5/6)+4 2/3]-0.1254.(-1 1/2)-1 1/4+(-2 1/2)-(-3 3/4)-(-1 1/4)5.1-5/12+4/15+1/12-14/15-1 19/20
1.如果a=-1/4,b=-2,c=-2 3/4,那么|a|+|b|-|c|=()
2.+0.125+(+3 1/4)+(-3 1/8)-1/8-(-1/4)
3.3.75-[(-3/8)+(-1/2)-(-5/6)+4 2/3]-0.125
4.(-1 1/2)-1 1/4+(-2 1/2)-(-3 3/4)-(-1 1/4)
5.1-5/12+4/15+1/12-14/15-1 19/20
1.如果a=-1/4,b=-2,c=-2 3/4,那么|a|+|b|-|c|=()2.+0.125+(+3 1/4)+(-3 1/8)-1/8-(-1/4)3.3.75-[(-3/8)+(-1/2)-(-5/6)+4 2/3]-0.1254.(-1 1/2)-1 1/4+(-2 1/2)-(-3 3/4)-(-1 1/4)5.1-5/12+4/15+1/12-14/15-1 19/20
1,|a|+|b|-|c|=1/4+2-2-3/4=-1/2
2,=1/8+3+1/4-3-1/8-1/8+1/4=3/8
3,=3+3/4+3/8+1/2-5/6-4-2/3-1/8=3+8/8+1/2-5/6-2/3-4=3/6-5/6-4/6=-1
4,=-1-1/2-1-1/4-2-1/2+3+3/4+1+1/4=-2-2/4-2-2/4+3+3/4+1=-4/4+3/4=-1/4
5,=1-4/12+4/15-14/15-1-19/20=1-1/3-2/3-1-19/20=39/20 或=1又20分之19