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1、 2位数加减法计算题 100道 用时： 错误： 25 21 = 44 40 = 58 30 = 75 53 = 83 51 = 45 52 = 68 30 = 22 76 = 71 14 = 17 10 = 20 60 = 24 15 = 88 61 = 26 22 = 37 41 = 58 10 = 74 21 = 87 85 = 65 22 = 74 22 = 35 20 = 12 45 = 15 84 = 87 10 = 86 84 = 12 83 = 40 13 = 10 56 = 33 34 = 10 50 = 75 60 = 67 55 = 46 10 = 78 10 = 62 3
2、1 = 54 20 = 70 25 = 74 51 = 70 12 = 70 28 = 23 21 = 34 53 = 48 26 = 15 24 = 32 51 = 88 31 = 58 42 = 13 80 = 54 20 = 60 12 = 66 41 = 66 65 = 25 23 = 26 42 = 55 34 = 34 40 = 74 63 = 33 21 = 42 51 = 48 30 = 46 10 = 63 20 = 52 50 = 47 11 = 25 23 = 41 45 = 23 34 = 41 32 = 27 61 = 78 10 = 35 54 = 57 36 = 34 65 = 20 14 = 63 20 = 65 34 = 86 11 = 65 22 = 47 36 = 14 15 = 75 70 = 48 25 = 62 14 = 77 72 = 38 11 = 66 53 = 87 25 = 36 25 = 25 40 = 44 21 = 76 11 = 22 45 = 34 11 = 53 40 = 14 22 = 51 13 = 47 41 = 55 42 = 37 31 = 20 27 =
