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Mathematics 11 Online
OpenStudy (anonymous):

9901x99=?

OpenStudy (rsadhvika):

i would use calculator... distribution does not look simpler than the straight forward multiplication ! distributing and subtraction takes as much time as regular multiplication.

OpenStudy (asnaseer):

or you could just multiply it by 100 first to get 990100, and then subtract 9901 from this.

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