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1、 2位数加减法计算题 100道 用时： 错误： 28 34 = 70 64 = 18 77 = 82 17 = 46 45 = 27 28 = 27 16 = 85 56 = 25 17 = 41 22 = 37 44 = 16 77 = 47 47 = 22 13 = 36 28 = 50 16 = 67 14 = 66 27 = 60 51 = 60 48 = 81 17 = 16 75 = 42 24 = 28 28 = 42 37 = 84 38 = 18 15 = 71 66 = 63 55 = 38 34 = 28 47 = 38 47 = 83 36 = 67 27 = 72 1
2、7 = 27 26 = 34 27 = 17 16 = 45 26 = 84 25 = 22 15 = 14 57 = 57 15 = 14 37 = 45 38 = 68 16 = 61 28 = 47 44 = 85 27 = 64 57 = 16 27 = 18 44 = 36 26 = 77 14 = 60 26 = 46 38 = 72 68 = 56 38 = 46 25 = 80 47 = 60 22 = 18 64 = 28 63 = 70 35 = 31 28 = 70 22 = 33 28 = 38 15 = 71 47 = 61 18 = 48 36 = 80 78 = 62 24 = 71 53 = 51 16 = 18 76 = 70 34 = 17 58 = 43 18 = 68 13 = 27 36 = 83 26 = 28 15 = 17 45 = 18 47 = 43 18 = 21 17 = 80 32 = 81 66 = 82 68 = 74 67 = 71 67 = 54 36 = 24 37 = 78 16 = 82 65 = 57 27 = 32 18 = 14 18 = 15 26 =
