Răspuns :
a)
25+36+19=61+19=80
b)
100-6-38=94-38=56
c)
49+37-28=86-28=58
d)
(25+9)+17=34+17=51
e)
90-(36+47)=90-83=7
f)
(84-65)+(53-49)=19+4=23
25+36+19=61+19=80
b)
100-6-38=94-38=56
c)
49+37-28=86-28=58
d)
(25+9)+17=34+17=51
e)
90-(36+47)=90-83=7
f)
(84-65)+(53-49)=19+4=23
25+36+19=61+19=80
100-6-38=94-38=56
49+37-28=86-28=58
(25+9)+17=34+17=51
90-(36+47)=90-83=7
(84-45)+(53-49)=19+4=23