Question

ayuda!!! porfavor lo entrego hoy​

Answer 1

Explicación paso a paso:

= 3 - 2 - 1

= (3 - 2) - 1

= 1 - 1

= 0

= - 4 + 0 + 4

= (-4 + 0) + 4

= - 4 + 4

= 0

= 1 + 2 - 3

= (1 + 2) - 3

= 3 - 3

= 0