12-20 22:50:41 浏览次数:453次 栏目:数学练习
一年级数学口算题:20以内的加减法
(1)4 - 3 =
(2)2 - 2 =
(3)10 + 2 =
(4)11 + 1 =
(5)1 - 1 =
(6)17 - 2 =
(7)14 - 5 =
(8)5 - 4 =
(9)5 - 3 =
(10)3 + 17 =
(11)17 + 1 =
(12)13 - 4 =
(13)15 - 12 =
(14)2 - 1 =
(15)15 - 5 =
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