(-4又7/8)-(-5又1/2)+(-4又1/4)-(+13又1/8)
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![(-4又7/8)-(-5又1/2)+(-4又1/4)-(+13又1/8)](/uploads/image/z/2591816-32-6.jpg?t=%28-4%E5%8F%887%2F8%29-%28-5%E5%8F%881%2F2%29%2B%28-4%E5%8F%881%2F4%29-%28%2B13%E5%8F%881%2F8%29)
(-4又7/8)-(-5又1/2)+(-4又1/4)-(+13又1/8)
(-4又7/8)-(-5又1/2)+(-4又1/4)-(+13又1/8)
(-4又7/8)-(-5又1/2)+(-4又1/4)-(+13又1/8)
(-4又7/8)-(-5又1/2)+(-4又1/4)-(+3又1/8)
=-4+5-4-3-7/8+1/2-1/4-1/8
=-6+1/2-1/4-(7/8+1/8)
=-7+1/4
=-(6又3/4)