小学数学一年级口算题：10以内的减法

(1)1 - 1 =

(2)7 - 3 =

(3)5 - 3 =

(4)3 - 2 =

(5)9 - 3 =

(6)4 - 2 =

(7)4 - 4 =

(8)3 - 2 =

(9)8 - 8 =

(10)3 - 2 =

(11)5 - 4 =

(12)5 - 2 =

(13)6 - 2 =

(14)8 - 2 =

(15)7 - 1 =