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nguyen hoang

21/07/2018 at 01:59
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please indicate how the area of the product:

(multiply 2 integer with the same sign)

 




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  • ...
    jimin bts cute 21/07/2018 at 02:02

    (+).(+)=+

    (+).(-)= -

    (-).(-)=+

    (+).(-)=-ok

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