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1、 2位数加减法计算题 100道 用时： 错误： 20 12 = 78 15 = 64 37 = 56 37 = 74 56 = 18 75 = 55 18 = 83 18 = 27 68 = 17 44 = 73 67 = 47 24 = 81 52 = 23 17 = 81 48 = 16 38 = 16 25 = 45 17 = 46 27 = 20 14 = 55 37 = 37 58 = 77 68 = 17 57 = 48 26 = 80 46 = 25 67 = 16 55 = 13 18 = 45 18 = 54 25 = 62 23 = 21 16 = 53 16 = 18 3
2、8 = 26 36 = 28 38 = 23 16 = 34 37 = 44 37 = 27 24 = 25 18 = 33 16 = 58 27 = 18 26 = 70 58 = 43 28 = 67 25 = 75 37 = 80 13 = 58 14 = 61 47 = 80 76 = 81 15 = 62 53 = 14 48 = 60 58 = 15 66 = 37 55 = 17 24 = 15 67 = 33 28 = 27 16 = 63 46 = 26 18 = 75 16 = 44 27 = 26 16 = 27 35 = 38 56 = 37 38 = 70 56 = 80 73 = 74 16 = 45 48 = 60 13 = 42 28 = 73 14 = 42 15 = 38 53 = 40 38 = 68 23 = 60 42 = 60 38 = 47 47 = 17 16 = 83 28 = 43 27 = 57 26 = 34 17 = 50 34 = 16 78 = 15 47 = 23 14 = 17 67 = 74 26 = 81 33 = 16 65 = 61 44 = 37 37 =
