-1^4+1又1/4x(3-5)³-18/5÷(4-1)²
=-1+5/4x(-8)-18/5÷9
=-1-10-2/5
=-11又5分之2
-12x(3/4-5/6+1/3)-(-2/3+1/12-1/15)x(-30)
=-12x3/4+12x5/6-12x1/3-2/3x30+1/12x30-1/5x30
=-9+10-4-20+5/2-6
=-29+2.5
=-26.5
-1/2与-5差的一半
【-1/2-(-5)】x1/2
=9/2x1/2
=9/4
不小于-5又1/2且不大于2的所有数的绝对值的和
-5+(-4)+(-3)+(-2)+(-1)+0+1+2
=-12
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