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1、 2位数加减法计算题 100道 用时： 错误： 58 13 = 73 70 = 84 30 = 68 31 = 73 11 = 75 23 = 87 56 = 54 41 = 34 10 = 87 51 = 46 43 = 30 64 = 86 42 = 88 75 = 25 74 = 53 36 = 26 12 = 23 55 = 67 13 = 47 45 = 20 35 = 75 24 = 75 11 = 11 35 = 24 43 = 45 24 = 11 28 = 46 43 = 38 32 = 31 66 = 36 31 = 28 16 = 78 31 = 87 60 = 43 1
2、0 = 78 44 = 82 10 = 42 17 = 86 45 = 52 17 = 22 37 = 25 61 = 23 40 = 77 12 = 86 25 = 64 41 = 33 52 = 84 23 = 47 30 = 25 54 = 22 34 = 38 25 = 20 77 = 38 13 = 47 32 = 65 30 = 85 11 = 54 22 = 41 50 = 46 11 = 88 26 = 57 45 = 12 83 = 66 61 = 37 11 = 55 43 = 88 31 = 62 23 = 53 10 = 22 47 = 82 70 = 75 11 = 84 72 = 70 20 = 32 47 = 48 30 = 75 74 = 47 32 = 10 77 = 61 21 = 85 11 = 63 41 = 46 11 = 87 31 = 68 63 = 78 14 = 65 60 = 57 55 = 38 26 = 65 43 = 38 20 = 60 15 = 21 28 = 85 10 = 76 25 = 37 14 = 55 43 = 20 13 = 63 10 = 54 25 =
