Hirokazu Komatsu

• 
  更多

  Abacus Lesson - Division - 1.2.1

  Hirokazu Komatsu - Freeware -

  The abacus, known as "Soroban" in Japan, is a traditional calculating tool that holds significant cultural value in several countries, including China and Korea. 更多資訊…
• 
  更多

  Abacus Lesson -Multiplication- 1.2.4

  Hirokazu Komatsu - Freeware -

  An abacus is known as a "Soroban" in Japan. Originating from ancient China, the abacus is a simple yet efficient calculating tool used across various countries including Japan and Korea. 更多資訊…
• 
  更多

  Abacus Exercise 2.2.1

  Hirokazu Komatsu - Freeware -

  This application emphasizes the user-friendly interface of the abacus feature, striving to provide seamless and convenient operation. 更多資訊…
• 
  更多

  Abacus Lesson 1.1.5

  Hirokazu Komatsu - Freeware -

  Can you solve 356+735+195, 23×89, 5626÷58 in 5 seconds using mental arithmetic techniques? This application aims to teach users how to operate an abacus proficiently and solve mathematical problems mentally within a time constraint of 5 … 更多資訊…
• 
  更多

  Abacus Lesson -ADD and SUB- 3.1.9

  Hirokazu Komatsu - Freeware -

  This app offers a unique learning opportunity for individuals seeking to improve their skills in addition and subtraction using an abacus. 更多資訊…