Hirokazu Komatsu
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MoreAbacus 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. more info... -
MoreAbacus 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. more info... -
MoreAbacus Exercise 2.2.1
Hirokazu Komatsu - Freeware -Abacus Exercise by Hirokazu Komatsu offers a comprehensive tool for improving mental math skills, perfect for both beginners and advanced users looking to enhance their numerical abilities. more info... -
MoreAbacus 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 … more info... -
MoreAbacus Lesson -ADD and SUB- 3.1.9
Hirokazu Komatsu - Freeware -Abacus Lesson -ADD and SUB- offers an interactive and effective way to grasp addition and subtraction concepts, making math fun for learners of all ages. more info...