亲爱小朋友们，今天为你准备了小学二年级数学下册口算题，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)70 + 30 =
(2)70 + 30 =
(3)70 + 50 =
(4)50 + 40 =
(5)40 + 90 =
(6)60 + 20 =
(7)70 + 70 =
(8)40 + 80 =
(9)30 + 70 =
(10)50 + 70 =
(11)20 + 50 =
(12)60 + 10 =
(13)30 + 50 =
(14)10 + 40 =
(15)80 + 70 =