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Suma a doua numere este egala cu 0,5(3)si diferenta lor este egala cu 0,1(3). Determinati cele doua numere.
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Răspuns :

Renatemambouko
0,5(3)=(53-5)/90=48/90 =24/45=8/15
0,1(3)=(13-1)/90=12/90=6/45=2/15
a+b=8/15
a-b=2/15
2a=8/15+2/15=10/15=2/3
a=(2/3) / 2=1/3
b=8/15-1/3=(8-5)/15=3/15=1/5

Silvia2004
0,5(3)=(53-5)/90=48/90 =24/45=8/15
0,1(3)=(13-1)/90=12/90=6/45=2/15
a+b=8/15
a-b=2/15
2a=8/15+2/15=10/15=2/3
a=(2/3) / 2=1/3
b=8/15-1/3=(8-5)/15=3/15=1/5

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