三位数的加减法
(1)332 - 246 =
(2)947 - 236 =
(3)285 + 691 =
(4)166 - 120 =
(5)792 + 192 =
(6)785 + 937 =
(7)460 + 991 =
(8)150 + 144 =
(9)544 - 492 =
(10)727 + 517 =
(11)274 - 226 =
(12)455 + 695 =
(13)204 - 191 =
(14)224 + 944 =
(15)704 + 736 =