Răspuns:
a)14+16-{8+[7-(2+3)]}=
14+16-[ 8+(7-5)]=
14+16-(8+2)=
30-10=20:
b)[24-(16-2)]-[18-(7+3-2)]=
(24-14)-(18-8)=
10-10=0;
c)120-{27-(5+1)-[13-(10-3)]}=
120-[27-6-(13-7)]=
120-(27-6-6)=
120-15=105;
d)28-(16-2)-{[3+(4-1)]-[5-(3-2)]}=
28-14-[(3+3)-(5-1)]=
14-(6-4)=
14-2=12;
e)24+2•(13•3-15•2):3=
24+ 2•(39-30):3=
24+ 2•9:3=
24+18:3=
24+6=30;
f)16+(135:3-15•3)•625=
16+(45-45l•625=
16+0•625=
16+0=16;
g)132-(5•68-112•3)•31=
132-(340-336)•31=
132-4•31=
132-124=8;
