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老爸：这题很难，听我慢慢讲！小明：一道算式就能解，这也叫难？
老爸说这个题很难，他足足给小明讲了半小时，小明都快听得睡着了，小明看了看，说“一道算式就能解，这也叫难题吗？”
小学数学图形计算100题，从课本到奥数各种题型各种难度都有18/100
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