三年级数学下册口算练习题 暑假作业第 1 日 (1)27 + 46 = (2)90 + 47 = (3)18 + 15 = (4)92 + 65 = (5)18 + 53 = (6)29 + 32 = (7)14 + 56 = (8)72 + 76 = (9)71 + 68 = (10)39 + 79 = (11)64 + 60 = (12)38 + 69 = (13)83 + 62 = (14)12 + 98 = (15)17 + 84 = (1)175 + 157 = (2)645 + 239 = (3)808 + 213 = (4)256 + 775 = (5)607 + 914 = (6)352 + 708 = (7)766 + 792 = (8)970 + 602 = (9)343 + 801 = (10)916 + 861 = (11)806 + 487 = (12)691 + 400 = (13)106 + 537 = (14)353 + 939 = (15)328 + 114 = 三年级数学下册口算练习题 暑假作业第 2 日 (1)810 - 125 = (2)648 - 585 = (3)398 - 148 = (4)716 - 117 = (5)704 - 124 = (6)449 - 312 = (7)713 - 288 = (8)202 - 155 = (9)954 - 286 = (10)802 - 668 = (11)860 - 162 = (12)287 - 167 = (13)859 - 371 = (14)941 - 343 = (15)472 - 425 = (1)900 - 168 = (2)300 - 186 = (3)900 - 554 = (4)800 - 200 = (5)700 - 666 = (6)300 - 122 = (