Tips: Japanese counting system
How to read numbers in Japan does not match how to read Western figures.
The important point is "4 digits".
If you ignore the comma and draw a line every four digits, you can easily read a big number.
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1-10
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
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10-100
10, 20, 30, 40, 50, 60, 70, 80, 90, 100
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100-1,000
100, 200, 300, 400, 500, 600, 700, 800, 900, 1,000
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1,000-10,000
1,000, 2,000, 3,000, 4,000, 5,000, 6,000, 7,000, 8,000, 9,000, 10,000
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10,000-100,000
10,000, 20,000, 30,000, 40,000, 50,000, 60,000, 70,000, 80,000, 90,000, 100,000