Respuesta :

60-30=30×40=70-80=-10

if the number of negatives are even they are always positive. if the number is odd of negatives. it always is negative. -- = + --- =-

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➷ [tex]\boxed{-10}[/tex]

[tex]60+(-30)+40-80[/tex]

[tex]= 30 + 40 - 80[/tex]

[tex]= 70 - 80[/tex]

[tex]= -10[/tex]

✽

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