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1、 2位数加减法计算题 100道 用时： 错误： 34 18 = 43 34 = 16 58 = 80 64 = 38 28 = 17 75 = 51 32 = 41 14 = 37 26 = 67 27 = 18 77 = 52 34 = 70 48 = 18 76 = 68 15 = 16 56 = 60 12 = 44 18 = 33 58 = 46 38 = 38 44 = 25 56 = 27 26 = 34 18 = 33 18 = 72 66 = 48 44 = 60 27 = 37 28 = 35 36 = 71 45 = 87 58 = 13 48 = 34 38 = 26 2
2、7 = 26 37 = 63 18 = 23 16 = 48 28 = 28 44 = 83 36 = 58 15 = 17 45 = 31 17 = 35 37 = 51 48 = 24 18 = 36 58 = 18 26 = 25 18 = 18 13 = 50 41 = 66 25 = 14 67 = 38 57 = 57 28 = 71 16 = 37 45 = 47 28 = 48 15 = 80 63 = 72 18 = 24 18 = 58 28 = 84 55 = 73 18 = 36 55 = 42 23 = 27 45 = 28 57 = 14 78 = 82 34 = 80 77 = 16 57 = 46 37 = 33 18 = 55 37 = 42 16 = 61 46 = 81 58 = 38 26 = 47 26 = 45 37 = 48 45 = 55 37 = 86 37 = 37 16 = 28 26 = 38 58 = 28 14 = 44 35 = 80 65 = 15 48 = 75 17 = 63 48 = 21 13 = 85 36 = 45 18 = 26 67 = 24 67 =
