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)250 - 170 =
(2)870 - 480 =
(3)890 - 470 =
(4)530 - 260 =
(5)380 - 130 =
(6)600 - 380 =
(7)840 - 730 =
(8)720 - 360 =
(9)780 - 710 =
(10)480 - 260 =
(11)550 - 390 =
(12)680 - 520 =
(13)340 - 270 =
(14)820 - 660 =
(15)230 - 230 =