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Alexeuu
a fost răspuns

Ajutatima urgent
Efectuati
a) {7015-[3015-(2004-4)]}-1=
b) 2000128-{[1256-(1139+117)]-128}=

Răspuns :

Icecon2005
a) {7015-[3015-(2004-4)]}-1=

=[7015-(3015-2000)]-1

=(7015-1015)-1

=6000-1

=5999

 b) 2000128-{[1256-(1139+117)]-128}=

=2000128-[(1256-1256)-128]

=2000128-[(1256-1256)-128]

=2000128-(-128)

=2000128+128)

=2000256