(-6又2/1)*4+(-4.28)*4又2/1-(-4.5)*(-5.72)
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![(-6又2/1)*4+(-4.28)*4又2/1-(-4.5)*(-5.72)](/uploads/image/z/752013-45-3.jpg?t=%28-6%E5%8F%882%2F1%EF%BC%89%2A4%2B%EF%BC%88-4.28%EF%BC%89%2A4%E5%8F%882%2F1-%EF%BC%88-4.5%EF%BC%89%2A%EF%BC%88-5.72%EF%BC%89)
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(-6又2/1)*4+(-4.28)*4又2/1-(-4.5)*(-5.72)
(-6又2/1)*4+(-4.28)*4又2/1-(-4.5)*(-5.72)
(-6又2/1)*4+(-4.28)*4又2/1-(-4.5)*(-5.72)
(-6又2/1)*4+(-4.28)*4又2/1-(-4.5)*(-5.72)
=-26-4.5×(4.28+5.72)
=-26-4.5×10
=-26-45
=-71