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How to do the short division of 40?

40。 Divided by 2 equals 20. 20÷2 equals 10 10÷2 equals 5.

Short division is a method to find the greatest common factor of several numbers. First of all, we adopt the method of observation and comparison, that is, first find out the factor of each number, then find out the common factor, and finally find out the biggest common factor among the common factors.