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tomatopl (25)

1 follower1 postNot following anybody3 SP#1,134,812

Joined March 2024 Active 3 years ago

  • tomatopl (25)in #cn • 3 years ago

    如何使用算盘

    1、正确摆放算盘。 算盘通常分为上下两档,上档每栏有一颗或两颗算珠,而下档每栏都有四颗算珠。开始计算时,上档所有的算珠都必须拨上去,而下档所有的算珠都必须拨下去。上档的每颗算珠代表数字5,下档的每颗算珠代表数字1。…
    100%
      10%25%50%75%100%
      $0.00
         5 1