Question

eliminando os parenteses e colchetes, resolva as expressoes:
a)100-(70+25)-(90-35)=

b)-23-(-75+19)+(-45+42-30)

me ajudem pfv...preciso das contas tbm​

Answer 1

a)100-(70+25)-(90-35)

100(-70-25)(-90+35)

100-95-55=+50

B)-23-(-75+19)+(-45+42-30)

-23(+75-19)(-45+42-30)

-23+56-33= 0