题目内容

计算(每小题3分)
  (1) -24+3-16-5;          (2)
  (3) ;        (4)
  (5)
(1);(2);(3);(4)0; (5)
(1)原式 -24+3-16-5           (2)原式
=-(24+16+5)+3                =
=-45+3                         =-8
=-42
(3)原式                (4)原式
=                  =
=6-1-                               =-1+1
=                                 ="0"
(5)原式
=
=
=
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