小学数学一年级口算题：5以内的加减法

(1)3 - 3 =

(2)3 - 1 =

(3)1 + 1 =

(4)4 + 1 =

(5)2 + 2 =

(6)2 - 2 =

(7)1 + 4 =

(8)1 + 2 =

(9)1 + 1 =

(10)1 - 1 =

(11)4 + 1 =

(12)2 - 2 =

(13)4 + 1 =

(14)1 + 1 =

(15)2 - 1 =