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1、 2位数加减法计算题 100道 用时： 错误： 52 24 = 40 38 = 63 26 = 73 57 = 53 26 = 37 18 = 16 48 = 70 18 = 57 48 = 31 25 = 70 22 = 82 55 = 17 54 = 48 36 = 55 47 = 77 16 = 16 45 = 68 16 = 54 28 = 81 62 = 27 66 = 46 16 = 48 34 = 47 34 = 65 26 = 61 24 = 27 64 = 46 17 = 82 27 = 55 28 = 15 27 = 47 17 = 85 17 = 45 16 = 48 2
2、3 = 26 58 = 45 28 = 45 48 = 37 37 = 47 37 = 80 35 = 53 28 = 76 17 = 24 37 = 48 45 = 18 67 = 18 58 = 83 25 = 66 18 = 51 13 = 48 43 = 15 47 = 34 17 = 38 43 = 54 48 = 74 18 = 84 28 = 66 27 = 71 56 = 28 25 = 34 17 = 75 16 = 44 17 = 72 68 = 16 55 = 47 24 = 17 74 = 64 48 = 40 17 = 73 64 = 38 33 = 53 24 = 46 28 = 48 46 = 17 64 = 63 28 = 44 25 = 51 24 = 70 37 = 54 45 = 50 21 = 13 38 = 35 26 = 46 47 = 37 15 = 25 58 = 17 47 = 27 15 = 38 46 = 77 14 = 35 26 = 48 33 = 20 17 = 28 14 = 24 68 = 30 21 = 63 45 = 63 55 = 58 14 = 16 58 =
