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Four short words sum up what has lifted most successful individuals above the crowd: a little bit more.-author-date两位数加减一位数进位加法、退位减法口算题+2两位数加减一位数进位加法、退位减法口算题+2姓名: 时间: 对数:93-7= 72-7= 84-9= 38+7= 94-7=36-8= 73-6= 63-8= 45-8= 38-6=56-9= 35-8= 84+7= 56+8= 45-9=29+8= 34+7= 23+9= 34-8= 67-8=54-8= 38-6= 92-7= 83-8= 77-9=54-7= 4 8-9= 52-8= 26+7= 77+8=83+6= 93-8= 67+5= 78+8= 56+9=43+7= 87+8= 67+6= 58-7= 93-8=56+8= 87-8= 58+8= 67-8= 88-9=65-7= 77-8= 86-8= 98-8= 48+7=-