怎样简便就怎样算. (1)+- (2)+++ (3) (4)-(+) (5)-+ (6)-(+)

小学数学题库 2025-08-29 00:27:30
怎样简便就怎样算。
(1)+-(2)+++(3)--
(4)-(+(5)-+(6)-(+
(1)+-
  =-
  =
(2)+++
  =+1
  =1
(3)--
  =-
  =
(4)-(+
  =-
  =0
(5)-+
  =+
  =
(6)-(+
  =-
  =