Răspuns :
cel mai mic numar de 3 cifre este 100
a+b=100+566=666
a-b=96
2b=666-96=570
b=285
a=285+96=381
a+b=100+566=666
a-b=96
2b=666-96=570
b=285
a=285+96=381
a-b=96 => a=96+b
(a+b)-100=566
a+b=666
96+b+b=666
96+2b=666
2b=666-96
2b=570
b=285
a=96+b
a=96+285
a=381
(a+b)-100=566
a+b=666
96+b+b=666
96+2b=666
2b=666-96
2b=570
b=285
a=96+b
a=96+285
a=381