b) [3x(12-3^2)=4^2:2^3]x5^0

c) (2^2x6+6^0):5

d) (15^2:3^2+14^2:7^2)x15:87

Răspuns:

Explicație pas cu pas:

b)

[ 3 × ( 12 - 3² ) + 4² : 2³] × 5⁰ = 11

= [ 3 × ( 12 - 9 ) + 16 : 8 ] × 1 =

= ( 3 × 3 + 2 ) × 1 =

= ( 9 + 2 ) × 1 =

= 11 × 1 =

= 11

_____________________

c)

( 2² x 6 + 6⁰ ) : 5 = 5

= ( 4 × 6 + 1 ) : 5 =

= ( 24 + 1 ) : 5 =

= 25 : 5 =

= 5

____________________

d)

( 15² : 3² + 14² : 7² ) × 15 : 87 = 5

= ( 225 : 9 + 2² × 7² : 7² ) × 15 : 87 =

= ( 25 + 4 ) × 15 : ( 29 × 3 ) =       ( 87 = 3 × 29 )

= 29 × ( 3 × 5) : ( 29 × 3 ) =

= 5