计算. (1)-+ (2)1 (3)-+ (4) (5)-(+) (6)+(-)

小学数学题库 2025-08-29 00:27:30
计算。
(1)-+(2)1-- (3)-+
(4) (5)-(+(6)+(-
(1)-+
  =+
  =
(2)1--
  =1-
  =
(3)-+
  =+
  =
(4)
  =+
  =
(5)-(+
  =-
  =
(6)+(-
  =+
  =