(-4.2)+5.7+(-8.4)+10 12-(-18)+(-7)-35 6.5+24-(-16)-6.8-3.2 (-1/4)+3又2/3+1/4+(-1又2/3)

(-4.2)+5.7+(-8.4)+10 12-(-18)+(-7)-35 6.5+24-(-16)-6.8-3.2 (-1/4)+3又2/3+1/4+(-1又2/3)

(-4.2)+5.7+(-8.4)+10
=-4.2+5.7-8.4+10
=3.1

12-(-18)+(-7)-35
=12+18-7-35
=-12

6.5+24-(-16)-6.8-3.2
=6.5+24+16-6.8-3.2
=6.5+40-10
=36.5

(-1/4)+3又2/3+1/4+(-1又2/3)
=-1/4+1/4+3又2/3-1又2/3
=0+2
=2

（-2又1/2）+（+5/6）-（+0.5）-（-1又1/6）
=-2又1/2-0.5+5/6+1又1/6
=-3+2
=-1追问还有一题追答回答了

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