Why do many mathematicians only know the answer but not the process?

This is because you haven't figured out how to convert the words in the math problem into numbers and formulas.

You gradually realize how you know this answer, and try to express yourself with numbers and symbols of addition, subtraction, multiplication and division. It is really impossible to express it in words and then compare it with the process formula in the standard answer. Practice this often, and you will find a rule.

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Current calculation formula What is current?

1, the current is measured by the amount of electricity (current intensity) passing through the cross section of the conductor in unit time, and the

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