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The problem of difference times in fourth grade mathematics
A simple way to solve this problem: the dislocation number is an integer multiple of the original number 10. If the right side of the decimal point is wrong, the new number is 10 times of the original number, two digits are 100 times, and the left side is wrong, which is 0. 1 times of the original number. Second, the difference between the new number and the original number is the extra multiple.

If the decimal point moves two places to the right in solving the problem, the new number is 100 times of the original number, that is, the new number is 99 times more than the original number, and the difference between the new number and the original number is 44.55, then the original number is

44.55÷( 100- 1)=0.45