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

小学数学题库 2025-08-29 00:28:15
计算。
(1)-+(2)+- (3)-+
(4)-(+(5)-(-(6)1-+
(1)-+
  =+
  =
(2)+-
  =-
  =
(3)-+
  =+
  =
(4)-(+
  =-
  =
(5)-(-
  =-
  =
(6)1-+
  =+
  =