灿若烟花520
幼苗
共回答了8个问题采纳率:87.5% 举报
(-0.8)+1.2+(-0.7)+(-2.1)+0.8+3.51
=1.2+3.51-2.8
=4.71-2.8
=1.81
1+(-1/2)+1/3+(-1/6)
=1/2+1/6
=2/3
1/2+(-2/3)+4/5+(-1/2)-(+1/3)
=4/5-1/3
=7/15
(-8)+10+2+(-1)
=12-9
=3
(-6)+3+9+(-4)+(-7)
=12-17
=-5
(-0.8)+1.2+(-0.7)+(-2.1)
=1.2-3.6
=-2.4
1+ 1/2+1/3+(-1/6)
=1+5/6-1/6
=5/3
1/2+(-2/3)+4/5+(-1/2)+(-1/3)
=1/2+(-1/2)+(-2/3)+(-1/3)+4/5
=-1/5
1年前
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