笑笑爷爷今年六十岁是他爸爸的两倍,他爸爸今年30岁对不对
\u7b11\u7b11\u7684\u7237\u7237\u4eca\u5e7460\u5c81\u662f\u7238\u7238\u5e74\u9f84\u76842\u500d,\u7238\u7238\u4eca\u5e7430\u5c81\u3002\u5bf9\u5417?\u975e\u5e38\u80af\u5b9a\u7684\u56de\u7b54\u4f60\uff0c\u5bf9\uff01\uff01\uff01
8\u00d78-25=64-25=39\uff08\u5c81\uff09\u7b54\uff1a\u7238\u7238\u4eca\u5e7439\u5c81\uff0e
没错，你算的是对的～～60÷30=2，所以是2倍
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