回复：儿子的数学也让俺胃疼，同时让俺也时髦一回

来源: 于 2010-11-22 17:27:05 [旧帖] [给我悄悄话] 本文已被阅读：次

He knows to add 28 and 12 first. That means he is smart enough as a 2nd grader. Please do not anticipate or force him to think as an adult.