问题标题:
求人帮我算算这六道数学题,要用递等式计算.(-31/4)+(-23/4)(-1.2)+(+11/5)1/3+(-7/3)(32/7)+(-25/7)(-1.9)+3.6+(-10.1)+1.4(-7)+(+11)+(-13)+9
问题描述:

求人帮我算算这六道数学题,要用递等式计算.

(-31/4)+(-23/4)(-1.2)+(+11/5)1/3+(-7/3)(32/7)+(-25/7)(-1.9)+3.6+(-10.1)+1.4(-7)+(+11)+(-13)+9

罗庆生回答:
  (-31/4)+(-23/4)   =-(31/4+23/4)   =-6   (-1.2)+(+11/5)   -(6/5)+6/5   =0   1/3+(-7/3)   =1/3-7/3   =2   (32/7)+(-25/7)   =23/7-19/7   4/7   (-1.9)+3.6+(-10.1)+1.4   (3.6+1.4)+[(-1.9)+(-10.1)]   =-7   (-7)+(+11)+(-13)+9   =(11+9)-(13+7)   =0   怎样,初一的,对么
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