(+30) . (+10)=
(+12) . (-5)=
(-10) . (+9)=
alguien me ayuda necesito el procedimiento
(+12) . (-5)=
(-10) . (+9)=
alguien me ayuda necesito el procedimiento
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(+30) × (+10) = 300
(+12 ) × (-5) = -60
(-10) × (+9) = -90