Question

[1,2(6)+3,(6)-3,5]:0,4(3)
{9,21-[(7,4-4,25-1,05):5,25] la puterea a-3-a ori 100-1,81} la puterea a-5-a ori 10-1

Answer 1

1,2(6)=(126-12)/90=114/90
3,(6)=(36-3)/9=33/9
3,5=35/10
0,4(3)=(43-4)/90=41/90
(114/90+33/9-35/10):41/90=
[(114+33x10-35x9)/90]x90/41=
[(114+330-315)/90]x90/41=simplif cu 90
=129/41=3,(14634)

ex.2
{9,21-[2,1:5,25]³x100-1,81}⁵x10⁻¹=
{9,21-0,4³x100-1,81}⁵x10⁻¹=
{9,21-0,064x100-1,81}⁵x10⁻¹=
{7,4-6,4}⁵x10⁻¹=
1⁵x10⁻¹=10⁻¹=1/10=0,1