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1、 2位数加减法计算题 100道 用时： 错误： 67 31 = 43 41 = 50 33 = 75 13 = 33 10 = 32 67 = 41 20 = 81 18 = 83 11 = 21 53 = 36 30 = 28 20 = 42 22 = 87 45 = 56 15 = 67 46 = 51 20 = 66 12 = 47 44 = 43 54 = 41 17 = 78 57 = 62 60 = 85 31 = 74 23 = 10 34 = 21 40 = 45 30 = 76 31 = 86 63 = 87 81 = 22 11 = 64 11 = 27 52 = 48 3
2、4 = 10 47 = 31 11 = 85 61 = 67 50 = 68 65 = 16 31 = 74 42 = 56 32 = 75 61 = 86 75 = 55 13 = 10 51 = 48 21 = 23 12 = 65 30 = 15 12 = 22 11 = 47 15 = 72 40 = 76 44 = 57 50 = 66 32 = 12 74 = 34 31 = 85 74 = 58 46 = 24 10 = 58 47 = 21 70 = 58 34 = 25 24 = 52 41 = 87 26 = 73 24 = 66 44 = 85 73 = 58 33 = 86 12 = 42 42 = 17 31 = 31 23 = 77 63 = 31 10 = 82 40 = 10 54 = 58 21 = 33 22 = 88 32 = 36 43 = 87 14 = 22 71 = 80 16 = 34 31 = 56 44 = 55 14 = 70 16 = 46 13 = 68 64 = 24 10 = 31 40 = 77 21 = 16 50 = 60 10 = 48 46 = 62 10 =
