国人会算术是因为买菜手工计算经常出错。这个阶段西方也经历过。收银机出来以后算数能力就直线下降

来源: 晚春123 于 2024-02-25 14:25:23 [旧帖] [给我悄悄话] 本文已被阅读：次

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