印度式19X19乘法口訣完爆中國式九九乘法表(圖)

來源: YMCK1025 於 2017-06-18 12:37:32 [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.