1.如果a=-1/4,b=-2,c=-2 3/4,那么|a|+|b|-|c|=()
问题描述:
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
答
1.如果a=-1/4,b=-2,c=-2 3/4,那么|a|+|b|-|c|=(-1/2)2.+0.125+(+3 1/4)+(-3 1/8)-1/8-(-1/4)=1/8+3又1/4-3又1/8-1/8+1/4=3又1/4+1/4+1/8-1/8-3又1/8=3又1/2--3又1/8=3.5-3.125=0.3753.3.75-[(-3/8)+(-1/2)-(...