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Elementary school mathematics calculation 48+0 1 1, 58+0 1 1 What did you find?
Its product law: the number of digits is 8, which is 2(48 58 68) less than the number of digits, the number of digits on the hundred digits is less than the number of digits 1(48 58 68), and the number of digits on the thousand digits is more than the number of digits 1(48 58 68).

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