Question

Ex 3 ajutor dau Coroana repede

Answer 1

3 a)
2⁰+2¹+2²+2³+2⁴x 3=
=1+2+4+8+16x3=
=15+48=
=63
b)
3x3²x[3+3²+3³+3⁴x(3⁵-2x11²)]=
=27x(3+9+27+81x(243-2x121)]=
=27x[39+81x(243-242)]
=27x(39+81x1)=
=27x120=
=3240
c)
2²x3²x5+(4x8-5²)x3=
=4x9x5+(32-25)x3=
=180+7x3=
=180+21=
=201

d)
(9³:9+9):(2³+7)-12²:72=
=(9²+9):(8+7)-144:72=
=(81+9):15-2=
=90:15-2
=6-2=
=4
e)
2x[3+4x(5+6x7)+8⁰]=
=2x[3+4x(5+42)+1]=
=2x(3+4x47+1)=
=2x(3+188+1)=
=2x192=
=384