1.(-83)+(+26)+(-41)+(+15),2.(+14)+(-4)+(-2)+(+26)+(-3)

问题描述:

1.(-83)+(+26)+(-41)+(+15),2.(+14)+(-4)+(-2)+(+26)+(-3)
3.(-9.6)+1.5+(-0.4)+(-0.3)+8.5

1、(-83)+(+26)+(-41)+(+15),2.(+14)+(-4)+(-2)+(+26)+(-3)
=-83+26-41+15
=-83+(26+14-41)
=83+0
=-83
2、(+14)+(-4)+(-2)+(+26)+(-3)
=14-4-2+26-3
=14+26-(4+2+3)
=40-9
=31
3.(-9.6)+1.5+(-0.4)+(-0.3)+8.5
=-9.6+1.5-0.4-0.3+8.5
=(1.5+8.5)-(9.6+0.4)-0.3
=10-10-0.3
=-0.3