亲爱小朋友们，今天为你准备了小学二年级数学口算题，相信大家一定能够努力做、开动脑筋，做出满意的答卷。加油啊!!!
(1)500 + 700 =
(2)800 - 400 =
(3)500 + 100 =
(4)1000 - 900 =
(5)200 + 200 =
(6)100 + 600 =
(7)500 - 400 =
(8)500 - 400 =
(9)1100 - 900 =
(10)1200 - 700 =
(11)400 + 300 =
(12)1200 - 600 =
(13)600 + 200 =
(14)100 + 200 =
(15)700 + 400 =