What operations are supported?

Three types: addition, subtraction, and multiplication.

Is it suitable for children?

Yes, this method is widely used in Japanese elementary schools and is effective for building foundational math skills. Difficulty can be adjusted to match the learner's level.

Past records are saved in browser local storage. Records reset when changing devices.

Yes, all processing happens in your browser. No data is sent to any server.

100-Grid Math Drill

A 10×10 grid math drill tool to practice arithmetic skills. A popular calculation training method widely used in Japanese education.

Operation

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How to Use

Step 1

Select Operation

Choose from addition, subtraction, or multiplication

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Step 2

Solve Problems

Challenge 100 grid problems with time tracking

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Step 3

Check Results

Check correct answers, time taken, and accuracy rate

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Features

Timer Function

Auto-timer measures completion time to track personal records

Difficulty Adjustment

Customize difficulty by changing the number range

Auto Grading

Automatically grade answers and highlight mistakes

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FAQ

A math training method popularized by Japanese educator Hideo Kageyama. Numbers are arranged along the top and left sides of a 10×10 grid, and you fill in each cell with the result of the operation (add, subtract, or multiply) for the intersecting row and column numbers. Repetitive practice builds speed and accuracy.

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