A si b exercitiul 4 urgrnt!!!!!

a) [3÷5+0.4]tot la puterea5=
[0.6+0.4]tot la puterea5=
[1] la puterea5=
1la puterea5=1
a=1.
b) (7/3+7/2)÷7/12-[3.3÷1/3-3÷0.3+1.5÷(1/2)²]=
/14+21/6 ×12/7-[3.3×3-10+1.5÷1/4]=
35/6×12/7-[9.9-10+1.5÷1/4]=
5×2-[9.9-10+6]=
10-[5.9]=
10-[5.9]=4.1
b=4.1 sper cas corecte.