Materia y números enteros

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-3-5 = ? 5-8= ? (-5)x4 = ?

-8. ; -3 ; -20

-6 - 5 =? 4 - 7 = ? (-5)x(-5) = ?

-11; -3 ; +25

-8 -4 = ? 5 - 9= ? (-5)·(-9) = ?

-12 ; -9 ; +45

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