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1、 2位数加减法计算题 100道 用时： 错误： 77 25 = 10 14 = 54 42 = 45 12 = 45 24 = 87 56 = 38 30 = 21 35 = 52 36 = 23 55 = 31 53 = 73 70 = 65 60 = 30 48 = 61 21 = 23 53 = 67 13 = 82 70 = 17 60 = 60 15 = 35 12 = 78 27 = 27 12 = 55 43 = 66 11 = 30 51 = 76 30 = 31 50 = 11 20 = 43 10 = 47 45 = 21 22 = 35 12 = 37 14 = 86 4
2、2 = 27 12 = 82 16 = 38 30 = 53 10 = 60 28 = 24 61 = 53 23 = 28 26 = 46 31 = 74 72 = 75 11 = 53 36 = 83 22 = 66 11 = 21 28 = 84 30 = 53 10 = 26 73 = 22 41 = 14 40 = 61 34 = 78 31 = 54 41 = 85 11 = 22 47 = 17 61 = 64 60 = 67 25 = 67 33 = 57 20 = 68 47 = 82 10 = 75 30 = 15 74 = 68 44 = 26 12 = 78 77 = 87 63 = 74 12 = 20 20 = 45 42 = 67 20 = 16 13 = 67 32 = 34 11 = 68 51 = 42 21 = 22 66 = 42 17 = 53 40 = 20 64 = 28 50 = 58 13 = 10 33 = 15 62 = 17 14 = 34 10 = 26 25 = 24 11 = 84 43 = 25 13 = 11 35 = 36 31 = 43 40 = 27 14 =
