Keisan Card (けいさんカード) turns first-grade addition and subtraction practice into short, ten-card sessions for classic Palm OS handhelds. Children begin by reading complete equations, then move on to answer and missing-number quizzes with a simple on-screen keypad.

Learn, Then Solve

The six levels combine two number ranges with three ways to practice:

Levels 1, 2 and 5 keep the addition total or the first number in subtraction between 0 and 10. Levels 3, 4 and 6 use 10 through 19. Addition and subtraction are mixed at random. Zero may appear as a number or as the answer, but no negative number or negative answer is used.

Every session contains ten cards worth ten points each. Study Levels 1 and 3 award ten points as each complete equation is shown. Quiz levels score the first answer submitted with OK. A 100-point session adds one clear, and ten cumulative clears unlock the next level. Clear counts and unlocked levels are saved; a lower score never removes progress.

What's New in 1.0.1

• New monochrome and color launcher artwork
• Shorter Japanese launcher name, けいさん, so it fits without truncation
• Refreshed PalmDB screenshots
• No gameplay or saved-progress format changes from 1.0.0

Features include:

• A large on-screen keypad with 0–9, DEL and OK
• Touchscreen and Palm hardware-button controls
• Built-in hardware-key help
• Palm OS system sounds with a mute option
• Saved clear counts and unlocked levels
• Japanese screen text on compatible Japanese systems, with an English fallback
• No registration code or external Palm libraries required

Two otherwise identical builds are provided. The JP build uses the compact launcher name けいさん; the EN build uses Keisan Card. Install only one, because both builds share the same Palm application identity and saved progress.

Compatibility

• Palm OS 3.1 or later
• Standard 160×160 Palm OS display
• 68K Palm OS application
• Monochrome application interface
• Monochrome and color launcher artwork
• Designed to support the Handspring Visor Deluxe

Download

Install either the Japanese-launcher or English-launcher PRC. Version 1.0.1 can be installed over 1.0.0 while retaining saved progress.

Also Available At

• Homepage