计算下面各题.(要有过程)1. (-25)+34+156+(-65) (-64)+17+(-23)+68 (-42)+57+(-84)+(-23) 63+72+(-96)+(-37) (-301)+125+301+(-75)

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计算下面各题.(要有过程)1.(-25)+34+156+(-65)(-64)+17+(-23)+68(-42)+57+(-84)+(-23)63+72+(-96)+(-37)(-301)+125+30

计算下面各题.(要有过程)1. (-25)+34+156+(-65) (-64)+17+(-23)+68 (-42)+57+(-84)+(-23) 63+72+(-96)+(-37) (-301)+125+301+(-75)
计算下面各题.(要有过程)
1. (-25)+34+156+(-65)
(-64)+17+(-23)+68
(-42)+57+(-84)+(-23)
63+72+(-96)+(-37)
(-301)+125+301+(-75)

计算下面各题.(要有过程)1. (-25)+34+156+(-65) (-64)+17+(-23)+68 (-42)+57+(-84)+(-23) 63+72+(-96)+(-37) (-301)+125+301+(-75)
=34-25+156-65
=(34+156)-(25+65)
=190-90
=100
=17-64-23+68
=-2
=57-42-84-23
=-92
=63+72-96-37
=26-96+72
=72-70
=2
=125+301-301-75
=125-75
=50